Antonyms of adv happily

2 senses of happily

Sense 1
happily, merrily, mirthfully, gayly, blithely, jubilantly -- (in a joyous manner; "they shouted happily")
       Antonym of unhappily (Sense 1)
      => unhappily -- (in an unpleasant way; "they were unhappily married")

Sense 2
happily -- (in an unexpectedly lucky way; "happily he was not injured")
       Antonym of sadly (Sense 1)
      => sadly, unhappily -- (in an unfortunate way; "sadly he died before he could see his grandchild")

Synonyms of adv happily

2 senses of happily

Sense 1
happily, merrily, mirthfully, gayly, blithely, jubilantly -- (in a joyous manner; "they shouted happily")

Sense 2
happily -- (in an unexpectedly lucky way; "happily he was not injured")