encerrar
transitive verb
1 (meter) to shut (up); (con llave) to lock (up)
encerré el gato en la cocina I shut the cat (up) in the kitchen; lo encerraron en su celda they locked him in his cell; la encerraron en un psiquiátrico they locked her up in a mental hospital; encerrar una frase entre paréntesis to put a phrase in brackets
pronominal verb
encerrarse1 (meterse) to shut o.s. (up); (con llave) to lock o.s. (up)
se encerró en su cuarto she shut herself (up) in her room; encerrarse en sí mismo to withdraw into o.s.; encerrarse en el silencio to maintain a total silence