'appendent' originates from Latin, specifically the verb 'appendere', where the prefix 'ad-' (seen as 'ap-' in this form) meant 'to' and 'pendere' meant 'to hang'.

'appendent' developed from the Latin present-participial form 'appendens' (from 'appendere'), passed into Late Latin/Medieval Latin with similar form and sense, and entered Middle English as 'appendent', yielding the modern English word 'appendent'.

Initially, it conveyed the sense 'hanging on' or 'hung upon', and over time it broadly shifted to the current sense of 'attached' or 'added'.