甲 斐 甲 斐(かいがい)しい

かいがいしい

i-adjective

devoted; diligent; attentive

Conjugation

	Affirmative	Negative
Present	甲斐甲斐(かいがい)しい	甲斐甲斐(かいがい)しくない
Past	甲斐甲斐(かいがい)しかった	甲斐甲斐(かいがい)しくなかった
て form	甲斐甲斐(かいがい)しくて	甲斐甲斐(かいがい)しくなくて
Adverbial	甲斐甲斐(かいがい)しく	—
Conditional ば	甲斐甲斐(かいがい)しければ	甲斐甲斐(かいがい)しくなければ
Conditional たら	甲斐甲斐(かいがい)しかったら	甲斐甲斐(かいがい)しくなかったら

1. devoted; diligent; attentive; industrious

Working or caring for someone with energetic dedication and attentiveness. Often describes someone bustling about to help or serve others with enthusiasm and care.

彼女(かのじょ)は甲斐甲斐(かいがい)しく病人(びょうにん)の世話(せわ)をした。

She devotedly cared for the sick person.

母(はは)は甲斐甲斐(かいがい)しく家事(かじ)をこなす。

Mother diligently takes care of the housework.

甲斐甲斐(かいがい)しく働(はたら)く姿(すがた)に感心(かんしん)した。

I was impressed by how industriously they worked.

甲斐甲斐(かいがい)しい → 甲斐甲斐(かいがい)しくない (negative)
甲斐甲斐(かいがい)しい → 甲斐甲斐(かいがい)しく (adverbial form)
甲斐甲斐(かいがい)しい → 甲斐甲斐(かいがい)しかった (past)

Usage

Describes someone working with energetic devotion, often in a caregiving or service role. Commonly used with:

甲斐甲斐(かいがい)しく世話(せわ)をする (to care for devotedly)
甲斐甲斐(かいがい)しく働(はたら)く (to work diligently)
甲斐甲斐(かいがい)しい態度(たいど) (attentive manner)

Conveys a positive image of someone bustling about with purpose and dedication. Often used to describe devoted care, housework, or hospitality.

Related words

From 甲斐(かい) (worth, effect), suggesting that one's efforts are worthwhile.

Related Words

Related: まめ (diligent)

general

Added 2026.1.18 13:18 · Revised 2026.9.2 13:01

06500/06674_kaigaishii