Where does “derb-” come from?

derb- (Middle Irish) comes from Old Irish derb-, from Old Irish derb, from Proto-Celtic derwos, from Proto-Indo-European drewh₂-, from Proto-Indo-European dóru, from Proto-Indo-European drew- — hard, firm, strong, solid; hard, fast; tree.

derb- (Middle Irish): with adjective surely, really, truly; used as intensifier

Definitions

  1. with adjective surely, really, truly; used as intensifier

Ancestry of “derb-”, step by step

StepLanguageWordMeaning
1Old Irishderb-surely, really, truly; used as intensifier; sure,...
2Old Irishderbsure, certain, fixed, determinate
3Proto-Celticderwosfirm
4Proto-Indo-Europeandrewh₂-steady, firm
5Proto-Indo-Europeandórutree
6Proto-Indo-Europeandrew-hard, firm, strong, solid; hard, fast; tree

Words derived from “derb-”

Every word from Proto-Indo-European drew- →Every word from Proto-Indo-European dóru →Every word from Proto-Indo-European drewh₂- →