If something is sufficient, there is enough of it.
Sufficient is a good thing. It means you have what you need and maybe even a little extra.
Examples:
I have sufficient food for the picnic.
She has a sufficient number of pencils for school.
The water in the bottle is sufficient for the trip.
I have a sufficient amount of candy for Halloween.
He has a sufficient number of toys to play with.
The cake was sufficient for everyone at the party.