factious = fact + ious. factious people are so concerned about their facts (views). so they wont agree with others. so factious means opposition or dissenting
FACTious: remember FACTorize
Factious can be remembered as a FACTory having a fight between board members, because of some FACTrIOUS people
factious..fact(iou)s...when pronounced sounds like FAX....so you recieved a fax stating about the rivals factions within the administration which is causing dissensions among members.
(fac)FAX + (ctious)Caution -> be prepared for trouble(dissension)