improve

The word 'improve' entered English in the late 15th century from Anglo-French 'emprouwer', meaning 'to turn to profit'. This was built on the Old French 'prou', meaning 'profit', which itself stemmed from Latin 'prode', a variant of 'prodesse' meaning 'to be of advantage'. The Latin components are 'pro-' (for, forward) and 'esse' (to be). The original English sense was 'to employ for profit, to make profitable use of'. The intensive prefix 'im-' (from Latin 'in-') was added to the root 'prove', which carried the sense of testing and demonstrating quality. Thus, the literal logic evolved from "to turn into profit" to the modern abstract meaning of making something better or more valuable, intensifying the action of bringing out its good qualities.

Structure: im + prove im: Latin origin, a prefix meaning 'in, into, on, toward'. In this context, it intensifies the meaning of the root. prove: From Anglo-French/Latin 'prover', meaning 'to test, demonstrate as good, approve'. Its functional role is the core root conveying the sense of testing for goodness or quality.