guard [ɡɑːd]
noun
1 (soldier) guardia (m); (sentry) centinela (m); (squad of soldiers) guardia (f); (escort) escolta (f)
to change (the) guard relevar la guardia; he's one of the old guard pertenece a la vieja guardia
2 (Mil) (also guard duty) (watch) guardia (f); (watchfulness) vigilancia (f)
to drop one's guard bajar la guardia; descuidarse
to keep guard vigilar
to keep guard over sth/sb (Mil) also vigilar algo/a algn
to lower one's guard bajar la guardia; descuidarse
to mount guard montar guardia
to be off one's guard estar desprevenido
to catch sb off his guard coger or agarrar a algn desprevenido or de imprevisto; (LAm)
to be on guard estar de guardia
to be on one's guard estar en guardia;against contra; to put sb on his guard poner a algn en guardia; prevenir a algn;against contra;
to stand guard over sth montar guardia sobre algo
to be under guard estar vigilado
to keep sb under guard vigilar a algn