Meaning & use
Instable
Last updated
Not stable; liable to change, give way, or collapse (a less common variant of "unstable").
See it in a sentence
The old bridge was deemed instable and closed to traffic.
Political tensions left the region instable for years.
A note on using this word
"Instable" and "unstable" mean the same thing, but "unstable" is far more common in modern English; "instable" survives mostly in older, dialectal, or French-influenced usage.
Words with a similar meaning
Choose a synonym to suit the sentence. Meanings can overlap without being identical.
Words with an opposite meaning
stablesteady
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