mender

The word 'mender' is a transparent English agent noun formation. Its core, 'mend', entered Middle English from Old French mender, which itself derives from Latin mendare (to correct, free from faults), a verb based on mendum (a physical flaw or blemish). The agent suffix '-er' is of ancient Germanic origin, traceable to Proto-Germanic -ārijaz, and is one of the most productive suffixes in English for forming nouns indicating one who performs an action. Thus, the literal "logic" of the word is directly preserved: a mender is "one who removes faults or blemishes," seamlessly connecting the Latin concept of a physical defect to the modern agent who repairs it.

Structure: mend (to repair) + er (agent suffix) - mend: From Latin mendum (fault, blemish), via Old French mender. Functions as the core verb root meaning to correct or repair. - er: From Old English -ere, a Germanic agent-noun suffix. Functions to denote a person or thing that performs the action of the verb.