'reassignment' originates from English, specifically formed by the prefix 're-' (meaning 'again') + the noun 'assignment' (from 'assign' + suffix '-ment').

'assign' comes from Old French 'assegner/assigner' and ultimately from Latin 'assignare' (ad- + signare), and English 'reassign' developed by adding the prefix 're-' to 'assign'; the noun 'reassignment' was formed with the suffix '-ment'.

Initially, 'assign' (from Latin 'assignare') meant 'to mark or allot', and over time 'reassign' and 'reassignment' came to mean 'to assign again' or 'the act/result of assigning again (often implying transfer or relocation)'.