the word 'unlucky' is a straightforward english formation built upon the core germanic noun 'luck,' which entered english from middle low german or middle dutch, signifying fortune or chance. the adjective-forming suffix '-y' (from old english '-ig') is appended to create 'lucky,' meaning "characterized by good fortune." the old english negative prefix 'un-' is then prefixed to invert the meaning, resulting in "not characterized by good fortune." this transparent compounding follows a common english morphological pattern for creating opposites, directly linking the absence of favorable chance to the modern sense of being unfortunate or ill-fated.

Structure: un (not) + luck (fortune) + y (adjective suffix) un: a prefix of germanic origin (old english) meaning "not," used to form negatives of adjectives and their derivatives. luck: a noun of middle low german or middle dutch origin (luc, gelucke), meaning "fortune, chance, good or bad happening." y: an adjective-forming suffix of old english origin (-ig), used to denote "having the quality of" or "characterized by."