Meaning : Having the requisite qualities or resources to meet a task.
Example :
She had adequate training.
Her training was adequate.
She was adequate to the job.
He was equal to the task.
Synonyms : equal
Lacking the requisite qualities or resources to meet a task.
Inadequate training.Meaning : Sufficient for the purpose.
Example :
An adequate income.
The food was adequate.
Enough food.
Food enough.
Synonyms : enough
Meaning : About average. Acceptable.
Example :
More than adequate as a secretary.
Synonyms : fair to middling, passable, tolerable