ink

The journey of 'ink' traces back to the ancient Greek concept of permanence, 'enkaustos', literally "burned in." This term was applied to a special, indelible ink reserved for imperial decrees in the Roman Empire, known in Late Latin as 'encaustum'. As the word passed through Old French ('enque'), it shed its technical association with the heating process and broadened to signify any writing fluid. The modern English simplex 'ink' thus carries a history that evolved from a specific, permanent, heat-fixed pigment to the general term for the colored liquid central to writing and printing.

The word 'ink' is a simplex loanword. It entered English from Old French 'enque', which derived from Late Latin 'encaustum', meaning "a purple-red ink used by Roman emperors for signatures." The Latin term itself came from Greek 'enkauston', a neuter form of 'enkaustos' meaning "burned in," from 'en-' (in) and 'kaiein' (to burn), referring to the process of making a permanent, heat-set pigment.