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unstable (adj.)
early 13c., "apt to move," from un- (1) "not" + stable (adj.). Similar formation in Middle High German unstabel. Meaning "liable to fall" is recorded from c. 1300; sense of "fickle" is attested from late 13c. An Old English word for this was feallendlic, which might have become *fally.
updated on April 07, 2014
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Dictionary entries near unstable
unspeakable
unspoiled
unspoken
unsporting
unsportsmanlike
unstable
unstack
unsteady
unstick
unstinted
unstinting