| heartless(adjective, cool, detached, blank, sober) |
| ho-hum(adjective, dull, boring, tedious, dreary) |
| hypochromic |
| immovable(adjective, cool, flat, detached, blank) |
| impassible(adjective, temper, cold, negative, behave) |
| in cold blood(expression, adjective, idiom, cool, flat) |
| indefinite |
| indistinguishable(adjective, pale, bland, monotonous, drab) |
| inhuman(adjective, temper, cold, negative, behave) |
| insensible(adjective, temper, cold, negative, behave) |
| insensitive(adjective, temper, cold, negative, behave) |
| insipid(adjective, dull, boring, routine, tedious) |
| irresilient(adjective, weak, soft, sloppy, fat) |
| lackadaisical(adjective, temper, cold, negative, behave) |
| laid back(expression, adjective, cool, detached, blank) |
| languid |
| lax(adjective, weak, soft, sloppy, fat) |
| leaden |
| lifeless(adjective, dull, boring, routine, tedious) |
| listless(adjective, temper, cold, negative, behave) |