Adjective:

ढिलमिल-यक़ीन, ढिलमिल, अस्थिर,

unstable's Usage Examples:

It is, however, unstable unless rigidly fixed at the piers.

From supersaturated solutions the form unstable at the temperature of the experiment is, as a rule, separated, especially on the introduction of a crystal of the unstable form; and, in some cases, similar inoculation of the fused substance is attended by the same result.

Dean searched for the right word, "unstable. Scared to death of him."

An unstable teen girl?

It is very unstable, decomposing into gold and sulphur at 200°.

Unstable as it was, their dynasty was soon established.

The closer they drew, the more intense the pressure, and the more unstable they became.

Lydia Larkin was a wreck, as unstable as the night Billy Langstrom died.

The new empire was unstable from the first.

Unstable as he was, it didn't take much to send Josh down the porch steps.

Synonyms:

tottering, inconstant, explosive, impermanent, rickety, tipsy, shaky, coseismal, cranky, seismal, tippy, unsteady, top-heavy, wonky, seismic, volatile, crank, rocky, coseismic, volcanic, wobbly, tender, temporary,

Antonyms:

hard, constant, permanent, stable, steady,