| mendacious | |
| partial(adjective, dark) | |
| persnickety(adjective, particular, fussy) | |
| prejudiced(adjective, dark) | |
| protected | |
| reticent | |
| safe | |
| sealed | |
| secret(adjective, hidden, unrevealed) | |
| secure(disregard, fail, loosen, unfix) | |
| shifty(adjective, limited, restricted, hindered) | |
| shut down(verb, expression, phrasal verb) | |
| shutter | |
| small | |
| standoffish | |
| subjective(adjective, limited, restricted, hindered) | |
| terminate(verb, stop, hold, accept, keep) | |
| tricky(adjective, dark) | |
| uncommunicative | |
| undercover(adjective, secret, spy) |
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| APA | Smart Define. (2016). open thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/open/thesaurus/antonyms |
| Chicago | Smart Define. 2016. "open thesaurus" https://smartdefine.org/open/thesaurus/antonyms (accessed September 23, 2026). |
| Harvard | Smart Define 2016, open thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/open/thesaurus/antonyms>. |
| MLA | Smart Define. "open thesaurus" 26 February 2016. Web. 23 September 2026. <https://smartdefine.org/open/thesaurus/antonyms> |