unstable

Meaning

Adj

1. Not stable.
2. Having a strong tendency to change.
3. Fluctuating; not constant.
4. Fickle.
5. Unpredictable.
6. Readily decomposable.
7. Radioactive, especially with a short half-life.

Verb

To release (an animal) from a stable.

Synonyms

unsteady

shaky

inconstant

changeable

fickle

volatile

rickety

unsound

labile

unsettled

wobbly

precarious

weak

insecure

loose

fragile

instable

erratic

dull

rough

uncertain

unreliable

not firm

mercurial

infirm

tottering

frail

fluid

fluctuating

erratical

floating

mentally ill

not strong

weakly

wavering

limply

unequable

unpredictable

variable

softly

shakily

unfirm

unbalanced

rocky

diseased

fluctuant

flow

descend

circulate

flimsy

Translations

instable

instabile

inestable

instável

instabil

unbeständig

labil

volubile

labile

ασταθής

gelgeç

inestable

unstabil

άστατος

haltlos

Pronounced as (IPA)

/ʌnˈsteɪbəɫ/

Etymology

Inherited from Middle English: unstable

In summary

From Middle English unstable; equivalent to un- (not) + stable.