Key Facts
- Hangul: 복잡하다 (bokjapada)
- Meaning: complicated
- Level: A2
- Part of speech: adjective
- Stem: 복잡하
- Conjugation class: 하다 type
- Grammar: 이/가 marks the complicated thing or crowded place, as in 지하철이 너무 복잡해요.
- Usage: Also for feelings: 마음이 복잡해요. Pronounced 복짜파다.
What Does 복잡하다 Mean?
복잡하다 covers many parts or many people. 복잡한 문제 is a tangled problem, 복잡한 설명 is a hard-to-follow explanation, and 지하철이 복잡해요 means the subway is crowded.
It can also describe mixed feelings: 마음이 복잡해요 says the heart is full of conflicting thoughts. The word does not mean hard by itself; that is 어렵다.
How Do You Pronounce 복잡하다?
Two sound changes happen in the lemma: ㄱ followed by ㅈ tenses the ㅈ, and ㅂ followed by ㅎ merges into an aspirated ㅍ, so the word is read [복짜파다]. In the polite present the contraction produces [복짜패요].
How Do You Use 복잡하다 in a Sentence?
지하철이 너무 복잡해요.
The subway is too crowded.
지하철이 names what is crowded, and 너무 means that it is too much.
복잡한 설명은 어려워요.
Complicated explanations are hard.
복잡한 modifies 설명은, and 어려워요 states the result: such explanations are hard.
길이 복잡해서 길을 잃었어요.
The streets were confusing, so I got lost.
복잡해서 gives the reason, and 길을 잃었어요 says the speaker got lost.
The examples cover the word's three settings: crowds on the subway (복잡해요), hard explanations (복잡한) and confusing streets (복잡해서).
How Does Bokjapada Conjugation Work?
복잡하다 is a 하다 adjective. 하 + 여 contracts to 해, so you get 복잡해요 and 복잡했어요. The modifier is 복잡한. The aspirated ㅍ appears in each form, so 복잡해요 is spoken [복짜패요] and 복잡합니다 is spoken [복짜팜니다].
To say something is not complicated, put 안 in front for 안 복잡해요 or use the long negative 복잡하지 않아요. The because-form is 복잡해서, the if-form 복잡하면, and the modifiers are 복잡한 (now), 복잡했던 (earlier) and 복잡할 (later); the honorific polite form is 복잡하세요.
복잡하다
| Form | Korean | Romanization | Rule |
|---|---|---|---|
| Polite present | 복잡해요 | ||
| Polite past | 복잡했어요 | ||
| Polite future (plan) | 복잡할 거예요 | ||
| Polite future (intention or guess) | 복잡하겠어요 | ||
| Formal present | 복잡합니다 | ||
| Formal past | 복잡했습니다 | ||
| Formal future | 복잡할 것입니다 | ||
| Casual present | 복잡해 | ||
| Casual past | 복잡했어 | ||
| Casual future | 복잡할 거야 | ||
| Honorific polite | 복잡하세요 | ||
| Because / and then | 복잡해서 | ||
| If (conditional) | 복잡하면 | ||
| Present modifier (before a noun) | 복잡한 | ||
| Past modifier (before a noun) | 복잡했던 | ||
| Future modifier (before a noun) | 복잡할 | ||
| Negative with 안 (short) | 안 복잡해요 | ||
| Negative (long form) | 복잡하지 않아요 |
No want-to row: -고 싶다 suits verbs.
Sound Changes
| Form | Korean | Sounds like |
|---|---|---|
| Polite present | 복잡해요 | [복짜패요] |
| Polite past | 복잡했어요 | [복짜패써요] |
| Polite future | 복잡할 거예요 | [복짜팔꺼예요] |
| Polite future guess | 복잡하겠어요 | [복짜파게써요] |
| Formal present | 복잡합니다 | [복짜팜니다] |
| Formal past | 복잡했습니다 | [복짜팯씀니다] |
| Formal future | 복잡할 것입니다 | [복짜팔꺼심니다] |
| Casual present | 복잡해 | [복짜패] |
| Casual past | 복잡했어 | [복짜패써] |
| Casual future | 복잡할 거야 | [복짜팔꺼야] |
| Honorific | 복잡하세요 | [복짜파세요] |
| Because form | 복잡해서 | [복짜패서] |
| Conditional | 복잡하면 | [복짜파면] |
| Present modifier | 복잡한 | [복짜판] |
| Past modifier | 복잡했던 | [복짜팯떤] |
| Future modifier | 복잡할 | [복짜팔] |
| Short negative | 안 복잡해요 | [안 복짜패요] |
| Long negative | 복잡하지 않아요 | [복짜파지 아나요] |
Common Mistake
Wrong: ✗ 복잡어요
Correct: ✓ 복잡해요
Why: A learner who writes 복잡어요 drops the 하 entirely. The full stem 복잡하 contracts with 여 into 해.
Crowded, Complex or Conflicted?
The context tells you which sense is meant: 지하철 suggests crowds, 문제 suggests complexity and 마음 suggests mixed feelings. 어렵다 stays reserved for difficulty, and 간단하다 is the plain opposite.
What Is Easy to Confuse with 복잡하다?
| Word | How to tell it from 복잡하다 |
|---|---|
| 간단하다 | 간단하다 is the opposite, simple. |
| 어렵다 | 어렵다 is difficult; 복잡하다 means many parts or many people, which may or may not be hard. |
Avoiding a Crowded Time on the Subway
Two friends are planning a trip. One remembers the crowd from yesterday and suggests changing the departure time.
Jisu
지금 지하철이 복잡해요?
Jigeum jihacheori bokjapaeyo?
Is the subway crowded now?
Minho
네. 어제도 이 시간에는 복잡했어요.
Ne. Eojedo i siganeneun bokjapaesseoyo.
Yes. It was crowded at this time yesterday too.
Jisu
복잡한 시간은 피하고 싶어요.
Bokjapan siganeun pihago sipeoyo.
I want to avoid the busy times.
Minho
그럼 조금 있다가 출발해요.
Geureom jogeum itdaga chulbalhaeyo.
Then let’s leave a little later.
복잡해요 describes the current crowd; 복잡했어요 gives yesterday’s experience as a comparison. 복잡한 modifies 시간, identifying the time they want to avoid. The conversation is about crowding, even though the dictionary’s first English gloss is “complicated”.
Four Common Combinations
교통이 복잡하다 describes busy or congested traffic. There are many vehicles or movements to navigate. 교통 is the subject, so the expression describes the traffic situation rather than saying a traveller personally finds every route difficult.
절차가 복잡하다 means a procedure is complicated. Think of several steps, documents or conditions to keep track of. 설명이 복잡하다 instead describes an explanation with many connected details. A simple task can have a complicated explanation if the speaker includes too much at once.
머릿속이 복잡하다 literally describes the inside of one’s head as complicated. The real meaning is having many thoughts competing for attention. It does not describe a medical condition. 마음이 복잡하다 more often highlights unsettled or mixed feelings, such as being pleased and worried about the same decision.
Crowded Does Not Always Mean Noisy
A crowded train can be quiet. 복잡하다 tells you about the number of people, vehicles or interacting parts; 시끄럽다 tells you about noise. If both are true, they are two descriptions of the scene. One word does not automatically include the other.
For crowds, 붐비다 is a useful related verb. It focuses directly on a place being crowded with people. 복잡하다 has the broader range: it can also describe a document, an explanation or conflicting thoughts. A crowded station and a complicated application form share the sense of much to deal with, but English chooses different words.
Where Will You See or Hear 복잡하다?
Travel conversations use 복잡하다 for crowded routes and stations. In an account of getting lost, 길이 복잡하다 may instead point to a confusing street layout. Listen for the reason that follows: difficulty finding a turn and difficulty moving through a crowd are different problems.
In an office, 복잡한 절차 or 복잡한 문제 can explain why a task needs more time. The word describes structure or the number of interacting details. A task can be complicated yet manageable for an expert, so translating it as “impossible” would exaggerate the claim.
In a drama, 마음이 복잡해요 can explain a pause before a decision or a reluctance to discuss feelings. The speaker has not named a single emotion. The listener needs the surrounding conversation to understand whether the conflict concerns family, work or a relationship.
Why Must 하 Stay in the Spelling?
복잡하다 ends in 하다, and the stem is 복잡하. The polite form contracts 하 and 여 to 해, giving 복잡해요. The modifier 복잡한 retains 하 and adds ㄴ. Removing 하 would leave neither the full adjective nor its correct conjugated form.
The sounds at the boundary between 복잡 and 하 can hide that structure from your ear. Keep 복잡하 in mind while reading the forms. The aspiration shown in the pronunciation table applies to the sounds; it does not replace the written ㅂ and ㅎ with ㅍ in normal spelling.
The negative 복잡하지 않아요 says the thing is not complicated or the place is not crowded, according to context. It need not mean the task is easy. A short but demanding task may have very few steps and still require skill.
| Related word | Meaning | Useful note |
|---|---|---|
| 교통 | traffic / transportation | Useful for congestion and route discussions. |
| 절차 | procedure | Names the sequence that can become complicated. |
| 붐비다 | to be crowded | Focuses on crowds of people. |
| 단순하다 | to be simple | Describes having few parts or little complexity. |
The subway vocabulary lesson supplies the station and travel words for the dialogue.
Mini Drill: Keep the 하다 Pattern
- Give the polite present of 복잡하다.
- Complete “a complicated explanation”: ____ 설명.
- Give the polite past.
- Give the long negative.
Show drill answers
- 복잡해요.
- 복잡한 설명.
- 복잡했어요.
- 복잡하지 않아요.
Quick Self-Test
- Must a 복잡한 subway be noisy?
- What does 절차가 복잡하다 describe?
- Does 마음이 복잡하다 identify one specific emotion?
Show answers
- No. Noise is described separately with 시끄럽다.
- A procedure with many steps or interacting requirements.
- No. It describes mixed or unsettled feelings; context supplies the details.
Frequently Asked Questions
Does 복잡하다 Mean Hard?
Not exactly. It means complicated or crowded; 어렵다 means difficult.
How Is 복잡하다 Pronounced?
[복짜파다].
How Do I Say My Feelings Are Mixed?
마음이 복잡해요.
What Is the Polite Present?
복잡해요.
Which Words Are Related to 복잡하다?
What Should You Learn Next?
Move to 간단하다 for the opposite and 어렵다 for the difficulty side. Its forms follow the pattern in how 하다 becomes 해요, and the aspirated [ㅍ] sound is the only extra thing to learn. Test 간단하다 beside it in the Korean verb conjugator, or browse the Korean verb dictionary.