"Eft" as an adverb derives from Old English, meaning "again" or "afterward," appearing in medieval poetry to indicate recurrence or subsequent action. Spenser and others used it to create archaic atmosphere and metrical flexibility. The word's brevity made it valuable for poets needing monosyllabic emphasis or specific metrical patterns. As a noun, "eft" referred to newts or salamanders, particularly juvenile stages, though this usage remained more dialectal. The adverbial sense appears in phrases like "eft-soons" (soon afterward) where it intensifies temporal progression. Medieval romance particularly favored "eft" for narrative sequencing—characters who went forth and came eft (back), actions done and done eft (repeated). Its archaic quality made it essential for poets deliberately cultivating obsolete diction to achieve pseudo-medieval effects or honor earlier literary traditions.

Eft demonstrates interesting dual usage: temporal adverb meaning "again" or "afterward" in archaic poetry, and noun meaning "newt" in natural history and dialect. The adverb appears throughout medieval and Renaissance poetry, particularly in refrains and repeated actions. Spenser employs it extensively for its archaic flavor. As noun, it appears in natural philosophy and regional writing. Related to "eftsoon" (soon afterward). Etymology from Old English "efta" (again). Essential for analyzing repetition, cyclical time, and refrain structures in poetry. The temporal sense suggests recurring patterns and cyclical worldviews. Useful for discussing archaic temporal expressions and how they differ from linear modern conceptions. The newt meaning appears in natural history poetry and regional color, sometimes symbolizing transformation through its amphibian nature.