SYN: Unmitigated, unpardonable, indefensible, unjustifiable.
ANT: Mitigable, {[paliable]?}, justifiable, vindicable, defensible, pardonable.
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KEY: Inexhaustible.
SYN: Incessant, unwearied, Indefatigable, perennial, illimitable.
ANT: Limited, scant, poor.
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KEY: Inexistence, [See EXISTENCE].
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KEY: Inexorable.