adjective stabler -·bler, stablest -·blest

1. 1. not easily moved or thrown off balance; firm; steady
   2. not likely to break down, fall apart, or give way; fixed
2. 1. firm in character, purpose, or resolution; steadfast
   2. reliable, dependable
3. not likely to change or be affected adversely; lasting; enduring
4. 1. emotionally steady; composed; self-possessed
   2. mentally sound; sane; rational
5. capable of returning to equilibrium or original position after having been displaced
6. Chem., Physics
   1. not readily decomposing or changing from one state of matter to another
   2. not undergoing spontaneous change
7. Nuclear Physics incapable of radioactive decay

Etymology: ME < OFr estable < L stabilis < stare, to stand