Meaning : Lacking or indicating lack of confidence or assurance.
Example :
Uncertain of his convictions.
Unsure of himself and his future.
Moving with uncertain (or unsure) steps.
An uncertain smile.
Touched the ornaments with uncertain fingers.
Incertain ka meaning, vilom shabd, paryayvachi aur samanarthi shabd in Hindi. Incertain ka matlab kya hota hai?