aberrant

• Meaning  -  abnormal or deviant

• Synonyms -  deviation, variation, distortion, error, disorientation.

• Antonyms -  truth, sanity.

• Usage -  Given the aberrant nature of the data, we came to doubt the validity of the entire experiment.

• Remember -  ab (away) + err (error) + ant : focus on ERR and ANT, usually an ant follows a path ... so moving away from (root ab means away from) that path means, error in regular path and hence deviating from normal path...or behaviour.