| unimpressed | (adj) not moved to serious regard, Example: trying to appear unimpressed |
| unimpressionable | (adj) not sensitive or susceptible to impression, Ant. impressionable, Example: an unimpressionable mind |
| unimpressive | (adj) not capable of impressing, Ant. impressive |
| unimpressively | (adv) in an unimpressive manner, Ant. impressively, Example: she scored unimpressively low in the first round of the competition |