Antonyms of adj untempered

2 senses of untempered

Sense 1
untempered (vs. tempered), unhardened -- (not brought to a proper consistency or hardness; "untempered mortar"; "untempered steel")

tempered (vs. untempered), treated, hardened, toughened -- (made hard or flexible or resilient especially by heat treatment; "a sword of tempered steel"; "tempered glass")
        => curable -- (capable of being hardened by some additive or other agent)
        => sunbaked -- (baked or hardened by exposure to sunlight; not burned; "sunbaked adobe bricks")

Sense 2
untempered (vs. tempered) -- (not moderated or controlled; "his untempered individualism")

tempered (vs. untempered) -- (adjusted or attuned by adding a counterbalancing element; "criticism tempered with kindly sympathy")

Similarity of adj untempered

2 senses of untempered

Sense 1
untempered (vs. tempered), unhardened -- (not brought to a proper consistency or hardness; "untempered mortar"; "untempered steel")
       => brittle, unannealed -- ((of metal or glass) not annealed and consequently easily cracked or fractured)

Sense 2
untempered (vs. tempered) -- (not moderated or controlled; "his untempered individualism")
       => unmoderated -- (not made less extreme; "spoke with unmoderated harshness")