restrained
     adj 1: cool and formal in manner [syn: {reserved}, {reticent}, {unemotional}]
     2: under restraint [ant: {unrestrained}]
     3: marked by avoidance of extravagance or extremes; "moderate
        in his demands"; "restrained in his response" [syn: {moderate}]
     4: not showy or obtrusive; "clothes in quiet good taste" [syn:
        {quiet}]
     5: free from ostentation or pretension; "the restrained
        elegance of the room" [syn: {modest}, {unostentatious}]
     6: prudent; "guarded optimism" [syn: {guarded}]
Source: WordNet® 2.0