誠心誠意
せいしんせいい
seishinseii
JMdict entry #1381190
- adverb (fukushi)noun (common) (futsuumeishi)nouns which may take the genitive case particle 'no' yojijukugo in all sincerity; with one's whole heart; whole-hearted devotion
Kanji in this word
Example sentences
彼は誠心誠意、彼女に尽くした。
kare ha seishin seii 、 kanojo ni tsukushi ta 。
He devoted himself whole-heartedly to her.