Vocabulary · 15 min read

How to Say 'First' in Korean: 첫, 처음, 먼저, 일단, and More

You want to say "first" in Korean. Simple, right? Then you discover 첫, 처음, 먼저, 우선, 일단, 제일, 첫째, 최초, 맨 처음. Nine options that all translate to "first" but mean completely different things. Pick the wrong one and your sentence says something you didn't intend.

Here's the sentence that trips up almost every learner: "I came to Korea for the first time." Students say 한국에 먼저 왔어요, which actually means "I came to Korea first (before someone else)." The correct version is 한국에 처음 왔어요. That single word swap changes the entire meaning. This article covers every way to say "first" in Korean, when each one is used, and the mistakes you need to avoid.

The Core Three: 첫, 처음, 먼저

These three cause the most confusion because they all translate to "first" in English, but they fill completely different grammatical roles.

첫 (cheot): "first ___" (modifier before nouns)

첫 is a determiner (관형사). It can only appear directly before a noun. It cannot stand alone, and it cannot modify a verb. Think of it as "first" in "first day" or "first love."

Formality: Neutral. Works in all registers.

Common mistake: Using 첫 as a standalone noun. You cannot say 이것은 첫이에요. You need 이것은 처음이에요 ("this is my first time") or 이것은 첫 번째예요 ("this is the first one").

처음 (cheoeum): "for the first time" / "the beginning"

처음 works as both a noun and an adverb. As a noun, it means "the first time" or "the beginning." As an adverb, it means "for the first time." The key idea: something is happening that has never happened before.

Formality: Neutral. Universal across all registers.

Common mistake: Using 처음 to modify nouns directly. You cannot say 처음 사랑. It must be 첫사랑. Similarly, 처음 학생 is wrong. The correct form is 첫 번째 학생.

먼저 (meonjeo): "first" as in before others

먼저 is an adverb meaning "before (someone else)" or "before (doing something else)." It is about sequential priority, not novelty. You are doing something ahead of another person or action.

Formality: Neutral. Very common in daily conversation. 먼저 하세요 ("After you") is a standard polite expression.

The Summary: 첫 vs 처음 vs 먼저

The rule: 첫 + noun. 처음 + verb (or as noun). 먼저 + verb (sequential).

The Priority Pair: 우선 vs 일단

Both mean "first" in the sense of "let's do this first," but with different mindsets.

우선 (useon): "first of all" (deliberate priority)

우선 signals importance. It says "this matters most, so we should address it first." It can also function as a noun meaning "priority" (안전이 우선이다 = "Safety is the priority").

Formality: Slightly formal. Common in workplace, presentations, and organized speech.

일단 (ildan): "first, let's just..." (tentative first step)

일단 is one of the most natural and frequently used adverbs in spoken Korean, yet textbooks often skip it. It means "for now, let's just do this first and figure the rest out later." It carries uncertainty about what comes next.

Formality: Casual to neutral. Very conversational. Native speakers use 일단 constantly.

Ordinals and Superlatives

첫째 (cheotjjae): "firstly" / "the eldest"

첫째 is used for structured listing (첫째, 둘째, 셋째 = "firstly, secondly, thirdly") and for birth order ("the eldest child").

첫째 vs 첫 번째: 첫째 is for formal listing and children's birth order. 첫 번째 is the more general ordinal "the first one" (question, try, time, etc.). In everyday speech, 첫 번째 문제 (the first problem) is more natural than 첫째 문제.

제일 (jeil): "#1, the most"

제일 comes from the Chinese characters 第一 (number one), but in modern Korean it functions as a superlative marker meaning "the most," not an ordinal "the first."

제일 vs 가장: Functionally identical. 제일 is slightly more colloquial; 가장 is slightly more formal/written. Both work everywhere.

Common mistake: Using 제일 as an ordinal. "The first chapter" is NOT 제일 장. It is 첫 번째 장.

Formal and Emphatic: 최초, 맨 처음, 맨 먼저

최초 (choecho): "the first ever" (formal)

From Chinese 最初 (the very first). Used in news, history, and records. You probably won't produce this in conversation, but you'll encounter it constantly in Korean media.

맨 처음 / 맨 먼저: "the very first"

맨 is an intensifier meaning "the very." It combines with position words: 맨 앞 (the very front), 맨 뒤 (the very back), 맨 위 (the very top). With 처음 and 먼저, it adds emphasis.

Bonus: 선착순 (first-come, first-served)

One more useful expression: 선착순 (先着順) means "first-come, first-served order." You'll see it everywhere in Korea.

The Complete Summary