ἡνίκα
Etym. adverb of Time, relat. to τηνίκα
1. "at which time, when", Od., Trag.: also causal, "since", Pind., attic
2. with Opt. in orat. obl., or to denote an uncertain or repeated occurrence in past time, "whenever", Soph., etc.
3. ἡνίκ᾽ ἄν, like ὅταν, with Subj., of the future, "whenever", id=Soph., etc.