fain

 
Pronunciation: /feɪn/
archaic

adjective

[with infinitive]
  • 1pleased or willing under the circumstances: the traveller was fain to proceed
  • 2compelled by the circumstances; obliged: he was fain to acknowledge that the agreement was sacrosanct

adverb

  • gladly: I am weary and would fain get a little rest

Origin:

Old English fægen 'happy, well pleased', of Germanic origin, from a base meaning 'rejoice'; related to fawn2