D defs.my
Entry 4 senses Webster, 1913

Happily

/(hăp"pĭ*ly̆)/ · Hap·pi·ly · IPA /ˈhæp.ə.li/
01 adv. By chance; peradventure; haply.
  1. 1.
    By chance; peradventure; haply.[Obs.]
  2. 2.
    By good fortune; fortunately; luckily.
    “Preferred by conquest, happily o'erthrown.” Waller.
  3. 3.
    In a happy manner or state; in happy circumstances; as, he lived happily with his wife.
  4. 4.
    With address or dexterity; gracefully; felicitously; in a manner to insure success; with success.
    “Formed by thy converse, happily to steer From grave to gay, from lively to severe.” Pope.