Un·war·rant·a·ble a. Not warrantable; indefensible; not vindicable; not justifiable; illegal; unjust; improper. -- Un*war*rant*a*ble*ness, n. -- Un*war*rant*a*bly, adv.
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unwarrantably
adv : in an unwarrantable manner or to an unwarranted degree; "in
this painting, the relationship of the upper part of
the body to the lower is uneasy and the right thigh
seems unwarrantably stressed"