blither

blither · verb, noun¹

1. Old Norse · derived fromblaðr“nonsense”
2. Old Norse · derived fromblaðra“to talk foolishly or inarticulately”
3. Middle English · inherited frombloderen
4. English todayblither

The verb is a variant of blether (Northern England, Scotland), blather (“to say (something foolish or nonsensical); to say (something) in a foolish or overly verbose way; to babble (something); to talk rapidly without making much sense; to cry loudly, blubber”), from Middle English bloderen, blotheren (“to babble; to cry loudly, blubber”), from Old Norse blaðra (“to talk foolishly or inarticulately”), from blaðr (“nonsense”); further etymology uncertain. The noun is a variant of blether, blather (“foolish or nonsensical talk”), either from blether, blather (verb), or from Old Norse blaðr (“nonsense”): see above.

blither · adjective²

From blithe + -er (suffix forming the comparative forms of adjectives).