| English adjective: unstable | |||
| 1. | unstable lacking stability or fixity or firmness | ||
| Samples | Unstable political conditions. The tower proved to be unstable in the high wind. An unstable world economy. | ||
| Similar | coseismal, coseismic, crank, cranky, explosive, rickety, rocky, seismal, seismic, shaky, tender, tippy, tipsy, top-heavy, tottering, volatile, volcanic, wobbly, wonky | ||
| See also | impermanent, inconstant, temporary, unsteady | ||
| Antonyms | stable | ||
| 2. | unstable highly or violently reactive | ||
| Samples | Sensitive and highly unstable compounds. | ||
| Similar | reactive | ||
| Antonyms | unreactive | ||
| 3. | unstable affording no ease or reassurance | ||
| Samples | A precarious truce. | ||
| Synonyms | precarious | ||
| Similar | uneasy | ||
| Antonyms | easy | ||
| 4. | unstable suffering from severe mental illness | ||
| Samples | Of unsound mind. | ||
| Synonyms | mentally ill, unsound | ||
| Similar | insane | ||
| Antonyms | sane | ||
| 5. | unstable disposed to psychological variability | ||
| Samples | His rather unstable religious convictions. | ||
| Similar | irresolute | ||
| Antonyms | resolute | ||
| 6. | unstable subject to change; variable | ||
| Samples | A fluid situation fraught with uncertainty. Everything was unstable following the coup. | ||
| Synonyms | fluid | ||
| Similar | changeable, changeful | ||
| Antonyms | unchangeable | ||