Lewis & Short

nixŭrĭo, īre,

  1. I. v. a. desid. [nixus, from nitor], to wish to lean or rest upon: nixurit qui niti vult et in conatu saepius aliquā re perpellitur, Nigid. 144, 20.
  2. II. Transf., for parturio, to wish to bring forth: nixurio, φιλοτοκέω, Gloss. Philox.