Sufficient (adjective)

1. Adequate for the purpose.
2. Being as much as is needed.
3. Being enough.

Origin:

Middle english, from latin sufficient-, sufficiens, from present participle of sufficere to suffice.

Examples:

1. The evidence was sufficient to prove his guilt.
2. The money was sufficient to cover the expenses.
3. The food was sufficient to feed the whole family.
4. The water supply was sufficient for the entire village.
5. The test results were sufficient to diagnose the illness.