Sufficient means enough or adequate for a particular purpose. It implies that something is present in a quantity or quality that is satisfactory or meets a specific need.
Here are some examples:
Sufficient food: There is enough food to feed everyone.
Sufficient time: We have enough time to finish the project.
Sufficient knowledge: She has sufficient knowledge to pass the exam.
In essence, something that is sufficient is neither excessive nor deficient; it is just the right amount.