一 意 専 心(いちいせんしん)

いちいせんしん

noun, adverb

single-minded devotion; wholehearted concentration

formalwrittenliterarycognition

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)に打(う)ち込(こ)んだ。

He devoted himself single-mindedly to his research.

一意専心(いちいせんしん)で練習(れんしゅう)を続(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)は一意専心(いちいせんしん)、子(こ)どもたちの教育(きょういく)に人生(じんせい)を捧(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

general

Added 2026.3.18 13:31 · Revised 2026.9.2 13:01

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