obnīxus (not obnīsus), adj.
P. of obnitor, strenuous, firm, resolute : (velim) obnixos vos impetum hostium excipere, L.: curam sub corde premebat, V.: non cedere, V.
obnixus, a, um, Part. and P. a., from obnitor. ...
A New Latin Dictionary by Charlton T. Lewis Ph.D. and Charles Short, LL. D.