| disinterested(adjective, calm, indifferent, unconcerned, unemotional) |
| dull(adjective, calm, tough, rational, straightforward) |
| easygoing(adjective, unexcitable) |
| going with the flow(expression, adjective, impassive, laid-back, dispassionate) |
| inactive |
| inexcitable(adjective, cool, blank, aloof, unemotional) |
| inscrutable(adjective, cool, blank, aloof, unemotional) |
| languid(adjective, indifferent, unconcerned, uncaring, passive) |
| meek(adjective, unexcitable) |
| mild(adjective, unexcitable) |
| miserly(adjective, ascetic) |
| moderate(adjective, unexcitable) |
| neutral(adjective, unexcitable) |
| not responsive(expression, adjective, impassive, laid-back, dispassionate) |
| poker-faced(adjective, cool, blank, aloof, unemotional) |
| rolling with the punches(expression, adjective, impassive, laid-back, dispassionate) |
| smooth |
| spiritless(adjective, cool, blank, aloof, unemotional) |
| staid(adjective, unexcitable) |
| stark(adjective, ascetic) |