the word 'unblemished' is a compound formed within english. its core, 'blemish', entered middle english from old french blesmir, meaning 'to make pale, wound', which is likely of germanic origin, possibly related to old norse blár (blue, livid). the prefix 'un-', of old english origin, is a prolific negator. the suffix '-ed' is used to form participial adjectives. the literal construction "not marked by a flaw" directly and logically yields the modern abstract meanings of physical perfection or moral purity, preserving a clear semantic link from its constituent parts.

Structure: un (not) + blemish (flaw) + ed (adjective suffix) - un: a prefix of germanic origin (old english) meaning "not". - blemish: a morpheme of germanic origin (old french blesmir, of germanic origin) meaning a flaw, mark, or imperfection. - ed: a suffix of germanic origin (old english) used to form adjectives from nouns or verbs.