Definition of melancholily in English:

melancholily

Pronunciation /ˈmɛlənkɒlɪli/ /ˈmɛləŋkɒlɪli/

adverb

  • In a melancholy manner; melancholically.

Origin

Mid 16th century; earliest use found in Thomas Cromwell (d. 1540), royal minister. From melancholy + -ly.