IPA: /ˌɪn.təˈræ.tɪk/
KK: /ˌɪntəˈrætɪk/
Relating to or occurring between atoms.
The interatomic forces play a crucial role in determining the properties of materials.
Interatomic → It is formed from "inter-" (meaning between) and "atomus" (from Greek ἄτομος, meaning indivisible). The word "interatomic" refers to the interactions or relationships that occur between atoms.
Think of interactions that happen "between" ('inter-') "indivisible units" ('atomus') — that's what interatomic means.