Adjective
Authorized by commission, precept, or right; justifiable; defensible; as, the seizure of a thief is always warrantable by law and justice; falsehood is never warrantable.
Source: Webster's dictionaryShould an unwarrantable measure of the federal government be unpopular in particular States, which would seldom fail to be the case, or even a warrantable measure be so, which may sometimes be the case, the means of opposition to it are powerful and at hand. James Madison
The anger is not warrantable that has seen two suns. English Proverb