conceal verb
ADV. completely | partially, partly | barely, scarcely He waited with barely concealed impatience. | carefully, cleverly, cunningly | dishonestly | effectively, successfully
VERB + CONCEAL be able/unable to She was unable to conceal her surprise. | try to | manage to
PREP. from He concealed the truth from her.
You can also check other dicts: conceal (English, 中文解释 ), wordnet sense, Collins Definition