expression, ichidan verb
do wholeheartedly; put one's heart into
Expresses doing something with sincere effort, care, or emotion. Often used in set phrases like 心を込めて (wholeheartedly).
母は心を込めて料理を作った。
My mother put her heart into cooking the meal.
心を込めてお礼の手紙を書いた
I wrote a thank-you letter with all my heart.