一いち意い専せん心しん

adverb, noun, noun which may take the genitive case particle 'no'

single-mindedly; wholeheartedly; with all one's heart

A yojijukugo expressing undivided focus and dedication, often used in formal or motivational contexts.

• 彼かれは一いち意い専せん心しん、研けん究きゅうに打うち込こんだ。

  He devoted himself single-mindedly to his research.

• 一いち意い専せん心しんの努ど力りょくが実みを結むすんだ。

  His wholehearted efforts bore fruit.