結構けっこう

1. 1splendid ; nice ; wonderful ; delightful ; lovely ; excellent ; fine
2. 2sufficient ; satisfactory ; enough ; fine ; all right ; OK
3. 3not needing (any more of something) ; (already) having enough ; fine (as in "I'm fine") ; no, thank you
4. 4rather ; quite ; fairly ; pretty ; surprisingly ; quite a bit ; fairly well
5. 5structure ; construction ; framework ; architecture

JMdict entry 1254760 · frequency rank 8. Source and licence.