乐意
lè yì · HSK 7
to be happy to do sth
😊👍 乐 (joy) + 意 (intention) = a joyful intention to do it = willing
乐 — stylized depiction of a wooden instrument with strings
Originally a pictograph of a wooden frame holding strings or bells, representing a musical instrument. The character first meant 'music' (read yuè), and by extension came to mean 'joy, happiness' (read lè), since music brings pleasure. The simplified form 乐 streamlines the older 樂.