indurate

The word 'indurate' originates from the Latin verb 'indurare', meaning "to make hard". This verb itself is a compound of the prefix 'in-' (signifying "in, into") and the root 'durus' (meaning "hard"). The Latin 'durus' is traced back to the Proto-Indo-European root deru-/dreu-, which carried the core meaning of "to be firm, solid, steadfast", a root also giving rise to words like 'tree', 'true', and 'endure'. The literal sense of physically hardening something (like clay or soil) was the original meaning in English. Over time, through metaphorical extension, the term evolved to describe the process of making attitudes, feelings, or character figuratively hard, rigid, or unfeeling.

Structure: in (in, into) + dur (hard) + ate (verb/adjective suffix) - in: Latin prefix meaning "in, into, on". - dur: Latin root from 'durus', meaning "hard". - ate: Latin-derived suffix used to form verbs meaning "to make or become" and adjectives meaning "characterized by".