Where does “atomic” come from?

Atomic derives from English atom, from Ancient Greek ἄτομος meaning indivisible, from the prefix ἀ- meaning not and a root from Proto-Indo-European sem- meaning one.

atomic (English): Of or relating to atoms; composed of atoms;...

Definitions

  1. Of or relating to atoms; composed of atoms;...

Ancestry of “atomic”, step by step

atomic traces back through two separate lines of ancestry.

via English atom

StepLanguageWordMeaning
1EnglishatomThe smallest possible amount of matter which...
2Middle Englishattomeatom
3Middle Frenchathomeatom
4Latinatomusindivisible; an atom, particle incapable of being...
5Ancient Greekἄτομοςuncut; indivisible, not capable of being...
6Ancient Greekἀ-The alpha privativum, used to make words that...
7Proto-Hellenichə-same; together
8Proto-Indo-Europeansm̥-one; with, together
9Proto-Indo-Europeansem-together, one

via French atomique

StepLanguageWordMeaning
1Frenchatomiqueatomic
2French-iqueUsed to form adjectives from nouns: -ic, -ical,...
3Middle French-iqueic
4Old French-ique-ic
5Latin-icusbelonging to; derived from; of or pertaining to;...
6Proto-Italic*-ikosforms adjectives with the sense of 'of or pertaining to'

Words derived from “atomic

Every word from Proto-Indo-European sem-Every word from Ancient Greek ἀ-Every word from Ancient Greek ἄτομος