fain
adverb/feɪn/
/feɪn/
(old use)- willingly or with pleasure
欣然；乐意地 - I would fain do as you ask.
听候你的吩咐。
Word OriginOld English fægen ‘happy, well pleased’, of Germanic origin, from a base meaning ‘rejoice’; related to fawn ‘to try to please someone by paying them too much attention’. - I would fain do as you ask.