thundering · verb, adjective, adverb1
- Middle English · inherited fromthonderynge
- English todaythundering
From Middle English thonderynge, þoundryng, equivalent to thunder + -ing.
thundering · noun2
- Old English · inherited fromþunring“thundering; thunder”
- Middle English · inherited fromthundryng
- English todaythundering
From Middle English thundryng, þondring, from Old English þunring (“thundering; thunder”), equivalent to thunder + -ing.
Etymology from Wiktionary, CC BY-SA 4.0.