'forepart' originates from Old English, specifically a compound of 'fore' and 'part', where 'fore' meant 'before, in front' and 'part' meant 'portion or piece'.

'forepart' formed in Old English as a compound of 'fore' + 'part' and has persisted into modern English with little change in form.

Initially it meant 'the front part or forward section' and this basic meaning has remained largely unchanged into modern usage.