Unresistible

Part of speech: adjective

Definitions

1. So powerful or compelling that it cannot be opposed, refused, or held back by anyone
2. Describing an urge, force, or attraction that overwhelms every attempt to withstand it
3. Impossible to repel or deny, as when a desire or influence simply cannot be fought off

Etymology: "Unresistible" is a plain formation: the prefix "un-", meaning "not", attached to "resistible", which itself comes from "resist" plus the suffix "-ible", meaning "able to be". Together they describe something that cannot be resisted, or that is too strong to withstand. The base word "resist" came into English from Old French "resister", which in turn descends from Latin "resistere", meaning "to stand back" or "to withstand", built from "re-" (back, against) and "sistere" (to stand). The "-ible" ending, borrowed through French from Latin "-ibilis", turns a verb into an adjective of ability, so "resistible" means able to be resisted. Adding "un-" reverses that sense.