Here are examples of the word/phrase "adequate" used in a sentence and paraphrased in a sentence...
Fortunately, the training I did was adequate for completing this mission.
Fortunately, the training I did was good enough for completing this mission.
I was happy to receive an encore after an adequate performance.
I was happy to receive an encore after a sufficient performance.
Just having enough to survive is adequate for those poor villagers.
Just having enough to survive is sufficient for those poor villagers.
Other Examples...