LIGHTSOMELY
lightsomely, light-heartedly
(adverb) in a light-hearted manner; “he light-heartedly overlooks some of the basic facts of life”
lightsomely, trippingly
(adverb) moving with quick light steps; “she walked lightsomely down the long staircase”
Source: WordNet® 3.1
Etymology
Adverb
lightsomely (comparative more lightsomely, superlative most lightsomely)
(archaic) In a lightsome manner.
Source: Wiktionary
LIGHTSOME
Light"some, a.
1. Having light; lighted; not dark or gloomy; bright.
White walls make rooms more lightsome than black. Bacon.
2. Gay; airy; cheering; exhilarating.
That lightsome affection of joy. Hooker.
– Light"some*ly, adv.
– Light"some*ness, n.
Happiness may walk soberly in dark attire, as well as dance
lightsomely in a gala dress. Hawthorne.
Source: Webster’s Unabridged Dictionary 1913 Edition