unstable

adjective ! Definition from WordNet 3.1, Princeton University. Pronunciation from Wiktionary, via Kaikki.org. More about unstable at Wordnik → Where our words come from →

1. Lacking stability or fixity or firmness.

   unstable political conditions

2. Highly or violently reactive.

   sensitive and highly unstable compounds

3. Affording no ease or reassurance.

   a precarious truce