一心不乱(いっしんふらん)

いっしんふらん
na-adjective, noun, adverb
wholeheartedly; single-mindedly
1. wholeheartedly; single-mindedly; with undivided attention
Being completely focused on one thing without any distraction; concentrating with one's entire heart and mind.
彼(かれ)は一心不乱(いっしんふらん)に勉強(べんきょう)した。
He studied single-mindedly.
一心不乱(いっしんふらん)に仕事(しごと)に打(う)ち込(こ)む。
To throw oneself wholeheartedly into work.
一心不乱(いっしんふらん)に走(はし)り続(つづ)けた。
I kept running with complete focus.

FOUR-CHARACTER IDIOM (四字熟語(よじじゅくご)):
一心(いっしん) (one mind) + 不乱(ふらん) (not distracted)
Literally: "one mind, not scattered"

ORIGIN:
Originally a Buddhist term describing a meditative state of complete concentration.

COMMON COLLOCATIONS:

SIMILAR EXPRESSIONS:

Related Words

Related: 無我夢中(むがむちゅう) (being absorbed)
Related: 一途(いちず) (single-mindedly)
general
Added 2026.1.16 18:38 · Revised 2026.6.8 4:10
05500/05692_isshinfuran