shamefaced

the word 'shamefaced' is a fascinating example of folk etymology reshaping language. it originated in the late 16th century as an alteration of the now-obsolete word 'shamefast', which combined 'shame' with the old english suffix '-fæst' meaning 'firmly fixed'. a 'shamefast' person was one firmly fixed in modesty or restraint. however, the similarity of '-fast' to the common word 'face' led to a reinterpretation of the word's meaning and spelling. speakers logically, but incorrectly, associated it with having a face that displays shame. this new form, 'shamefaced', won out, embedding the vivid imagery of a downcast or blushing countenance directly into the word's structure, which perfectly captures its modern meaning.

Structure: shame + faced shame (old english, noun: a painful feeling of humiliation or distress) + faced (old english, past participle of 'face', used to form adjectives meaning 'having a face of a specified kind')