un·sta·ble 
(ŭn-stābəl)
(ŭn-stābəl)adj. un·sta·bler, un·sta·blest
1.
a. Tending strongly to change: unstable weather.
b. Not constant; fluctuating: unstable vital signs.
2.
a. Wavering or fickle: At first, he was unstable in his decisions.
b. Showing or marked by erratic or volatile emotions or behavior.
3. Not firmly placed; unsteady: an unstable ladder.
4. Chemistry
a. Decomposing readily.
b. Highly or violently reactive.
5. Physics
a. Decaying with relatively short lifetime. Used of subatomic particles.
b. Radioactive.
un·stable·ness n.
un·stably adv.
- anaphoric
- anaphrodisia
- anaphrodisiac
- anaphylactic
- anaphylactically
- anaphylactic shock
- anaphylactoid
- anaphylaxis
- anaplasia
- anaplasmosis
- anaplastic
- anapsid
- anarch
- anarchic
- anarchical
- anarchically
- anarchism
- anarchist
- anarchistic
- anarcho-syndicalism
- anarchy
- an arm and a leg
- anarthria
- anarthric
- anarthrous