| hushed(verb, concealed) | |
| hustling(adjective, lively, active, busy, occupied) | |
| imbed | |
| immerse | |
| in a meeting(expression, idiom, active, occupied, working) | |
| in conference(expression, adjective, active, occupied, working) | |
| in eclipse | |
| in purdah | |
| in the field(expression, idiom, active, occupied, working) | |
| in the laboratory(expression, idiom, active, occupied, working) | |
| incog(secret, hidden, underground, underhanded, covered) | |
| incognito(secret, hidden, underground, underhanded, covered) | |
| incommunicado | |
| industrious(adjective, lively, active, busy, occupied) | |
| inter | |
| inundated | |
| locked in(expression, adjective, confined, imprisoned) | |
| mysterious | |
| obfuscated | |
| occult |
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| APA | Smart Define. (2016). buried thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/buried/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "buried thesaurus" https://smartdefine.org/buried/thesaurus/synonyms (accessed September 24, 2026). |
| Harvard | Smart Define 2016, buried thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/buried/thesaurus/synonyms>. |
| MLA | Smart Define. "buried thesaurus" 3 April 2016. Web. 24 September 2026. <https://smartdefine.org/buried/thesaurus/synonyms> |