(いちいせんしん)

いちいせんしん
noun (adverb)
single-minded devotion; wholehearted concentration
1. single-minded devotion; wholehearted concentration
Devoting oneself entirely to one thing without distraction. A four-character compound (yojijukugo) expressing total focus and dedication.
一意専心(いちいせんしん)研究(けんきゅう)()()んだ。
He devoted himself single-mindedly to his research.
一意専心(いちいせんしん)練習(れんしゅう)(つづ)けた結果(けっか)優勝(ゆうしょう)できた。
As a result of practicing with single-minded devotion, I was able to win the championship.
彼女(かのじょ)一意専心(いちいせんしん)()どもたちの教育(きょういく)人生(じんせい)(ささ)げてきた。
She has devoted her life wholeheartedly to educating children.

USAGE:
A 四字熟語(よじじゅくご) used in formal speech and writing. Often placed at the beginning of a sentence as an adverbial phrase. 一意(いちい) means "one mind/intention" and 専心(せんしん) means "concentrated mind." Together they express total, undivided focus.

SIMILAR FOUR-CHARACTER COMPOUNDS:

  • 一心不乱(いっしんふらん): with undivided attention — similar meaning, slightly more common
  • 専心(せんしん): concentration — the latter half of this compound, usable on its own
  • 無我夢中(むがむちゅう): being completely absorbed — emphasizes losing oneself in an activity