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The Collaborative International Dictionary

Instable \In*sta"ble\, a. [L. instabilis: cf. F. instable. See In- not, and Stable, a., and cf. Unstable.] Not stable; not standing fast or firm; unstable; prone to change or recede from a purpose; mutable; inconstant.

Douglas Harper's Etymology Dictionary

c.1400, from Latin instabilis, from in- "not, opposite of" (see in- (1)) + stabilis (see stable). Now mostly replaced by unstable.


a. Exhibiting instability; unstable

Usage examples of "instable".

The distance of the former and the cautious, unassuming character of it's minister here is one cause of delays: a greater one is the greediness and instable character of the emperor.