| military |
| unfriendly |
| Siberian(adjective, cool, severe, keen, sharp) |
| algid(adjective, cool, severe, keen, sharp) |
| arctic(adjective, cool, severe, keen, sharp) |
| argumentative(adjective, determined, antagonistic, aggressive, fencing) |
| below freezing(expression, cool, severe, keen, sharp) |
| below zero(expression, cool, severe, keen, sharp) |
| biting(adjective, cool, severe, keen, sharp) |
| brumal(adjective, cool, severe, keen, sharp) |
| chill(adjective, cool, severe, keen, sharp) |
| chilled(adjective, cool, severe, keen, sharp) |
| confrontational(adjective, hostile, antagonistic, aggressive, belligerent) |
| ferocious |
| frigid(adjective, cool, severe, keen, sharp) |
| frore(adjective, cool, severe, keen, sharp) |
| frosty(adjective, cool, severe, keen, sharp) |
| gelid(adjective, cool, severe, keen, sharp) |
| glacial(adjective, cool, severe, keen, sharp) |
| have goose bumps(expression, idiom, cool, severe, keen) |