English

lightfulness

From lightful (adjective) (any sense) + -ness (suffix forming nouns).

Formed from lightful + -ness

Proto-Indo-European *lewk- ‘light’

…

Proto-West Germanic *leuht ‘light’

Old English lēoht ‘light, daylight’

Middle English light ‘the radiation which allows for vision by…’

Middle English lightful

Today it means

noun The quality of being lightful.

Language periods are conventional ranges, not dates for this word.

Etymograph / lightfulness