Is instable a correct word?

not stable; unstable.

Is it Instast or unstable?

The difference between “instability” and “unstability” is a spelling mistake. The correct word is “instability“. The English language is indeed strange because the correct word is unstable and not instable.

What is the meaning of the unstable?

Definition of unstable

: not stable : not firm or fixed : not constant: such as. a : not steady in action or movement : irregular an unstable pulse. b : wavering in purpose or intent : vacillating.

Is Unstableness a word?

1. The quality or condition of being physically unsteady: instability, precariousness, ricketiness, shakiness, unsteadiness, wobbliness.