unsure meaning in Urdu

How shy you are?
I am shy in front of people.
I love to sing, but I am shy in front of people.
Stood in the doorway diffident and abashed.
Problems that call for bold not timid responses.
A very unsure young man.

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.