- an archaic word for since
WordReference Random House Unabridged Dictionary of American English © 2026
sith
(sith),USA pronunciation adv., conj., prep. [Archaic.]
- since.
- bef. 950; Middle English; Old English siththa, dialect, dialectal variant of siththan, origin, originally, sīth thām after that, subsequently to that, equivalent. to sīth subsequently (akin to Gothic seithus, Old Norse sīth- late, German seit since) + thām, dative of demonstrative pronoun, i.e., "to that'' (see the1); compare Old Norse sīthan sith
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'sith' also found in these entries (note: many are not synonyms or translations):