obsero

obserō (1) āvī, ātus, āre

1 SER-, to bolt, bar, fasten, shut up : ostium intus, T.: aedificia, L.: aurīs, H.

obsero
obsĕro, āvi, ātum, 1, v. a. [ob-sera], to bolt, bar, fasten, or shut up (not in Cic. or Caes.; syn.:...

A New Latin Dictionary by Charlton T. Lewis Ph.D. and Charles Short, LL. D.