Use it to comment on someone's mental clarity or alertness, usually implying a lack.

Mental Sharpness

It's often used not to directly call someone insane but to hint at it tactfully.

Indirect Speech

This phrase is commonly used in negative sentences to politely state someone is mentally off.

It indicates that everything needed is available or nothing is missing.

Often used to reassure that all elements are in place for something to proceed.

Suggests someone has returned to good health or their normal state.

Implies overall physical health, not limited to fitness or absence of illness.