Where does “deontic” come from?

Deontic derives from Ancient Greek δέον, from δεῖ, from δέω, from Proto-Indo-European deh₁-, meaning to bind or constrain.

deontic (English): Pertaining to necessity, duty or obligation, or...

Definitions

  1. Pertaining to necessity, duty or obligation, or...

Ancestry of “deontic”, step by step

StepLanguageWordMeaning
1Ancient Greekδέονnominative/accusative/vocative singular neuter of...
2Ancient Greekδεῖit behoves one to, it is necessary to, one must;...
3Ancient GreekδέωI bind, tie, fasten, fetter; To lack, need,...
4Proto-Indo-Europeandeh₁-to bind

Words derived from “deontic

Every word from Proto-Indo-European deh₁-Every word from Ancient Greek δέωEvery word from Ancient Greek δεῖ
deontic — Etymology, Origin & Word History | Etymology Explorer