An example of an ineluctable act is the sun rising every day.
Origin of ineluctableClassical Latin ineluctabilis ; from in-, not + eluctabilis, that can be resisted by struggling ; from eluctari, to struggle ; from ex-, out + luctari, to struggle ; from Indo-European base an unverified form leug-, to bend from source lock, Classical Greek lygos, supple twig
Origin of ineluctableLatin inēluctābilis : in-, not; see in–1 + ēluctābilis, penetrable (from ēluctārī, to struggle out of : ex-, ex- + luctārī, to struggle).
(comparative more ineluctable, superlative most ineluctable)
From Middle French inéluctable, from Latin inēluctābilis, from in- + ēluctor (“struggle out”).