The idiom "on the mend" means that someone or something is recovering from a disease, injury, or illness. It suggests that the person or thing is improving and getting better.

The idiom "burn the candle at both ends" means to work very hard and not take any time off, or to exhaust oneself by working too much. It is a figurative expression that compares the act of working long hours to the literal act of burning a candle from both ends until it runs out of wax.

The idiom "on the brink of" means to be very close to something, often a dangerous or unfavorable situation. It can also mean to be about to do something, especially something important or significant.

The idiom "axe to grind" means that someone has a personal vendetta or grudge against someone or something. It implies that the person is motivated by a strong feeling of hostility or resentment and is seeking revenge or justice.

The idiom "Mr Right" and "Ms Right" refers to a person who is considered perfect for someone else. This means that they have all the qualities that someone desires in a partner, such as kindness, intelligence, and good looks.