Lewis & Short

immĕo (inm-), āre, v. n. [in-meo], to go into, to enter (post-Aug.): delphini inmeantes Nilo, Plin. 8, 25, 38, § 91: cisternis (aqua), Pall. 1, 17: inmeans spiritus, Plin. 11, 39, 92, § 226.