'applyment' originates from Middle English, formed from the verb 'apply' + the noun-forming suffix '-ment' (from Old French '-ment', ultimately from Latin '-mentum'), where 'apply' comes from Latin 'applicare' (from 'ad-' meaning 'to/toward' and 'plicare' meaning 'to fold or to attach').

'applyment' developed in Late Middle English as a nominal form related to the verb 'apply' (from Old French forms such as 'aplier'/'apliier'), ultimately tracing back to Latin 'applicare'; the suffix '-ment' came into English via Old French and Latin '-mentum'.

Initially, it meant 'the action or process of applying' and over time this core sense has remained, though the standalone noun became rare and was largely replaced by 'application' in modern English.