| Word | Definitions | Synonyms |
|---|---|---|
| insalubrious | (adjective) detrimental to health | Synonyms: unhealthful, unhealthy |
| insane | (adjective) afflicted with or characteristic of mental derangement | - |
| (adjective) very foolish | Synonyms: harebrained, mad | |
| insanitary | (adjective) not sanitary or healthful | Synonyms: unhealthful, unsanitary |
| insatiable | (adjective) impossible to satisfy | Synonyms: insatiate, unsatiable |
| insatiate | (adjective) impossible to satisfy | Synonyms: insatiable, unsatiable |