illegitimare

illegitimare 1 to act unlawfully. nec alicui prejudicat ecclesia in suo jure sic ~ans J. Burgh PO VIII 8 D. 2 to deprive of lawfulness. 1414 si quis ea [sc. bona lege] legitime utatur, talium ‥ ministrorum laquei et abusus illegitimi pene totum a lege Domini ~ant Christianismum; placeat ergo remedium invenire (Artic. Univ. Ox.) Conc. III 362.