빨리 vs 일찍: Fast vs Early in Korean

빨리 describes the speed at which something is done (quickly/fast), while 일찍 describes the timing of an action relative to an expected time (early).

Side-by-Side Comparison

	빨리 (ppalli)	일찍 (iljjik)
What It Describes	Speed or pace of an action	Time of an action relative to a schedule
Question It Answers	How fast? — 얼마나 빠르게?	When? — 언제? (earlier than usual)
Example Sentence	빨리 먹어 (eat quickly)	일찍 일어났어 (woke up early)
Interchangeable?	No — '빨리 왔어' = came quickly (fast trip)	No — '일찍 왔어' = arrived early (before time)
Antonym	천천히 (slowly)	늦게 (late)

Telling someone to hurry up — using 빨리

빨리 와! 늦겠어.

Come quickly! We'll be late.

Saying you woke up early today — using 일찍

오늘 일찍 일어났어.

I woke up early today.

Asking someone to speak faster — using 빨리

좀 더 빨리 말해 줄 수 있어요?

Can you speak a little faster?

Saying a friend arrived before everyone else — using 일찍

친구가 제일 일찍 도착했어.

My friend arrived the earliest.

✗Saying '빨리 왔어' when you mean you came early — 빨리 왔어 means you came quickly (fast), not early. Use 일찍 왔어 for early arrival.
✗Using 일찍 to describe speed — 일찍 only refers to timing, not how fast something was done.
✗Confusing the antonyms: 빨리 ↔ 천천히 (slowly), 일찍 ↔ 늦게 (late). These are not interchangeable pairs.
✗Translating English 'early' as 빨리 in phrases like '일찍 자다' (go to bed early) — always use 일찍 for early timing.

Can I say '일찍 빨리 출발해요' to mean 'let's leave early and quickly'?

Yes, you can use both together — 일찍 specifies the timing (early), and 빨리 specifies the pace (quickly). The sentence is grammatically natural.

What is the noun form of 빨리?

The related adjective is 빠르다 (to be fast), and the noun form is 빠름 (fastness) or 속도 (speed). 빨리 itself is an adverb.

Practice using 빨리 and 일찍 in real conversations with AI.