IPA: /ˌɛpɪˈsteɪsɪs/
KK: /ɪˈpɪstəˌsɪs/
A genetic interaction where one gene can hide or suppress the effect of another gene that is not its allele.
In genetics, epistasis can significantly influence the traits of an organism by masking the effects of other genes.
Epistasis → It is formed from "epi-" (meaning upon or over) and "stasis" (from Greek "stasis", meaning standing or stability). The term describes a genetic phenomenon where one gene's expression is affected by another gene, thus standing over or upon the effects of another.
Think of a gene that stands 'upon' ('epi-') another gene's effects, influencing its expression — that's what epistasis means.