endeavour (v.) Copy link Outline 1. cōnor, 12. nītor, ēnītor (the latter strengthened from the former)3. contendo, 3 • endeavour (v.): 1. cōnor, 1: the cavalry e. to break into the camp, equites in castra irrumpere c., Caes.: v. to attempt. 2. nītor, ēnītor (the latter strengthened from the former): to e. with all their efforts that ... not, summa ope niti ne, Sall.: Cic.: v. to strive. 3. contendo, 3: v. to exert oneself.