lè​yú

willing

乐于 (樂於) lè​yú
willing expression
happy and ready to do something, particularly to help others

He has always been a helpful student.

take pleasure in verb
to find enjoyment or delight in performing a particular activity

She is very happy to engage in scientific research.

Frequency

Movie subtitles
4.23 per million appears in 2% of films
Written text
4.45 per million

Sources

Definitions
CC-CEDICT