(definition) by Webster 1913 Wed Dec 22 1999 at 0:28:03

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.

 

© Webster 1913.

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