taru-adjective, adverb taking the 'to' particle
Describes a deeply felt, heartfelt manner of speaking, pleading, or expressing oneself. Often used with verbs like 語る, 訴える, or 願う.
彼は平和の大切さを切々と語った。
He spoke passionately about the importance of peace.
母親は息子の無事を切々と願った。
The mother fervently wished for her son's safety.
taru-adjective, adverb taking the 'to' particle
Describes something that deeply moves the listener or reader emotionally, often through sincere expression. Can modify nouns like 手紙 or 訴え.
彼女の切々とした手紙に心を打たれた。
I was deeply moved by her heartfelt letter.
被災地からの切々たる訴えが伝えられ
A touching appeal from the disaster area was conveyed.
熱心 means enthusiastic or eager, often about an activity or belief, while 切々 focuses on the emotional, heartfelt quality of expression.
感動的 means emotionally moving in a broad sense, while 切々 implies a more personal, earnest, and often sorrowful or pleading tone.
Reduplication of 切 (せつ), meaning 'earnest' or 'keen', emphasizing a deeply felt, sincere emotional state. The exact historical derivation is uncertain, but the form is classical and now mainly literary.