1. (adj)tempered, treated, hardened, toughened made hard or flexible or resilient especially by heat treatment Synonyms: tough, toughened, set, tempered, hardened, inured, treated, case-hardened, enured, hard-boiled Antonyms: brittle, unmoderated, untempered, unhardened, unannealed
2. (adj)tempered adjusted or attuned by adding a counterbalancing element Synonyms: toughened, hardened, treated Antonyms: unannealed, unhardened, untempered, unmoderated, brittle