be strong, be of value
A convalescent person spends time resting to gain health and strength after a serious illness or operation.
If you are ambivalent about something, you are uncertain whether you like it or what you should do about it.
When you validate something, you confirm that it is sound, true, legal, or worthwhile.
To prevail against someone is to triumph over them or be stronger than they are.
Someone who is valiant is brave, courageous, and bold in dangerous and often hopeless situations.
Things which are available are on hand and so are ready for use.
To evaluate something is to judge its value, worth, or importance.
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