the word 'umbrage' entered english in the late 15th century from middle french 'ombrage', meaning 'shade' or 'shadow', which itself derives from latin 'umbrāticum', a noun use of the neuter of 'umbrāticus' ('of or pertaining to shade'). this latin term originates from 'umbra', meaning simply 'shade' or 'shadow'. the semantic evolution from literal 'shadow' to the figurative sense of 'offense' or 'resentment' is a classic metaphorical shift. the connection lies in the idea of a shadow being cast over one's feelings, or the notion of taking offense at a slight, as if one has been overshadowed or put into the shade by another's actions.

the word is a simplex loanword from french. it is not productively segmented into smaller, meaningful morphemes in modern english.