IPA: /ˌɛlɛk.trəʊˈstæt.ɪk/
KK: /ɪˌlɛk.trəʊˈstæt.ɪk/
Related to electric charges that are not moving.
The electrostatic force between the two charged objects caused them to attract each other.
Electrostatic is formed from "electro-" (from Greek "ēlektron", meaning amber, which is associated with electricity) and "static" (from Greek "statikos", meaning causing to stand or stationary). The word describes the stationary electric charge that can accumulate on the surface of objects.
Think of 'amber' ('ēlektron') which is linked to electricity, and 'static' meaning something that is 'stationary'. This helps you remember that 'electrostatic' refers to stationary electric charges.