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.
彼は一意専心、研究に打ち込んだ。
He devoted himself single-mindedly to his research.
一意専心の努力が実を結んだ。
His wholehearted efforts bore fruit.