Roget's Thesaurus of English Words and Phrases by Peter Mark Roget

prohibitum [Lat.]; impropriety; illegality &c 964. falseness &c adj.; emptiness of title, invalidity of title; illegitimacy. loss of right, disfranchisement, forfeiture. usurpation, tort, violation, breach, encroachment, presumption, assumption, seizure; stretch, exaction, imposition, lion's share. usurper, pretender. V. be undue &c adj.; not be due &c 924. infringe, encroach, trench on, exact; arrogate, arrogate to oneself; give an inch and take an ell; stretch a point, strain a point; usurp, violate, do violence to. disfranchise, disentitle, disqualify; invalidate. relax &c (be lax) 738; misbehave &c (vice) 945; misbecome†. Adj. undue; unlawful &c (illegal) 964; unconstitutional; illicit; unauthorized, unwarranted, disallowed, unallowed†, unsanctioned, unjustified; unentitled†, disentitled, unqualified, disqualified; unprivileged, unchartered. illegitimate, bastard, spurious, supposititious, false; usurped. tortious [Law]. undeserved, unmerited, unearned; unfulfilled. forfeited, disfranchised. improper; unmeet, unfit, unbefitting, unseemly; unbecoming, misbecoming†; seemless†; contra bonos mores [Lat.]; not the thing, out of the question, not to be thought of; preposterous, pretentious, would-be. Phr. filius nullius.