誠せい心しん誠せい意いせいしんせいいじ字FuriganaMeanings1adverb, noun, noun which may take the genitive case particle 'no'in all sincerity; with one's whole heart; whole-hearted devotionyojijukugo (four-character idiom)›A yojijukugo expressing utmost sincerity and wholehearted effort, often used in formal or earnest contexts.彼かれは誠せい心しん誠せい意い
