lief

Từ điển Oxford Advanced Learner 8th

lief 7 BrE [liːf] NAmE [liːf] adverb (old use)
willingly; happily
•I would as lief kill myself as betray my master.

Word Origin:
[lief] Old English lēof ‘dear, pleasant’, of Germanic origin: related to the noun ↑leave and ↑love.

• Từ đồng nghĩa / Synonyms:
  gladly, fain