(けっこう)

けっこう
adverb, na-adjective
quite, fairly; fine, satisfactory; no thank you
quantitydescriptive
See also: 決行(けっこう) (carry out, go ahead)
1. quite, fairly, rather
Indicates a degree that is more than expected. Similar to 'pretty' or 'quite' in English.
この映画(えいが)結構(けっこう)おもしろい。
This movie is pretty interesting.
(えき)から結構(けっこう)(とお)です
It's quite far from the station, isn't it?
It looks easy, but it was actually pretty difficult.
2. fine, good enough, satisfactory
Expresses that something is acceptable or sufficient as it is.
これ結構(けっこう)です。
This is fine.
(あじ)なかなか結構(けっこう)だった。
The flavor was quite good.
()なさらず、そのまま結構(けっこう)です
Please don't worry — it's fine as it is.
3. no thank you, I'm fine
Used to politely decline an offer. Often perceived as a soft refusal.
もう結構(けっこう)です。
No thank you, I'm fine.
コーヒーおかわり?——いえ、結構(けっこう)です。
Would you like a refill of coffee? — No, I'm fine, thanks.
Shall I help? — No thank you, I can do it myself.

結構(けっこう) has multiple meanings that depend heavily on context.

As an adverb (sense 1), it emphasizes that something is more than expected. Often carries a nuance of mild surprise.

As a na-adjective (sense 2), it means fine or satisfactory. Used in polite contexts to express approval or acceptance.

As a polite refusal (sense 3), もう結構(けっこう)です is a standard way to decline offers. Note that this usage can sound blunt if the tone is not carefully managed.

Common patterns

  • 結構(けっこう) + adjective/verb: quite ~, fairly ~
  • これ結構(けっこう)です: this is fine
  • もう結構(けっこう)です: no thank you / that's enough

Usage: The refusal sense (もう結構(けっこう)です) can sound cold or dismissive in certain contexts. Softer alternatives include 大丈夫(だいじょうぶ)です or いいです.