longest Antonyms

least enduring most oblivious most negligent most neglectful most irresponsible most indifferent most inconsiderate most hurried most heedless most disregardful most offhand most regardless most slapdash least drawn-out most unthinking most unmindful most unheeding most uncaring most thoughtless most abstracted most absent-minded smallest shortest tiniest sloppiest hastiest giddiest foolhardiest flightiest bittiest least elongate least elongated least extended shortest-term most scatterbrained most inattentive most forgetful most careless most smallish most miniature most compressed least