Happily

adv.	1.	By chance; peradventure; haply.
	2.	By good fortune; fortunately; luckily. Preferred by conquest, happily o'erthrown. - Waller.
	3.	In a happy manner or state; in happy circumstances; as, he lived happily with his wife.
	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.

Adv.	1.	happily - in a joyous manner; "they shouted happily" Synonyms: blithely, gayly, jubilantly, merrily, mirthfully, with happiness Antonyms: unhappily - in an unpleasant way; "they were unhappily married"
	2.	happily - in an unexpectedly lucky way; "happily he was not injured" Antonyms: sadly, unhappily - in an unfortunate way; "sadly he died before he could see his grandchild"

happily - Of software, used to emphasise that a program is unaware of some important fact about its environment, either because it has been fooled into believing a lie, or because it doesn't care. The sense of "happy" here is not that of elation, but rather that of blissful ignorance. "The program continues to run, happily unaware that its output is going to /dev/null."

agreeably, airily, blessedly, blissfully, blithely, cheerfully, cheerily, delightedly, ecstatically, elatedly, enthusiastically, exultantly, favorably, fortunately, gaily, genially, gladly, gleefully, heartily, hopefully, irrepressibly, jauntily, joyfully, jubilantly, lightly, luckily, merrily, opportunely, optimistically, peaceably, pleasantly, propitiously, prosperously, providentially, rapturously, rhapsodically, satisfyingly, smilingly, successfully, swimmingly, willingly, with good cheer, with pleasure