Unsubstantiated, not based on fact or evidence.

Having or displaying malevolence or ill-will.

plural of ill turn

(dated) An act of unkindness or enmity. / (dated) A change for the worse.

An enzootic and often fatal viral disease of sheep and other domestic animals, spread by ticks. It is characterized by muscular tremors and spasms, followed by more or less complete paralysis. The principal lesion is an inflammation of the membranes covering the brain and spinal cord.

Alternative form of louping ill.

A feeling of animosity or resentment.

A bad reputation.

Poorly named; given an unsuitable name.

plural of ill name