set apart
     v 1: select something or someone for a specific purpose; "The
          teacher assigned him to lead his classmates in the
          exercise" [syn: {assign}, {specify}]
     2: set apart from others; "The dentist sequesters the tooth he
        is working on" [syn: {sequester}, {sequestrate}, {keep
        apart}, {isolate}]
Source: WordNet® 2.0