Be careful when working with high voltage.

The heavy rain caused high water levels in the river.

She always acts high-and-mighty around others.

She always stays at high-class hotels when she travels.

She is a high-flier in her field.

She is a high-flyer in her company.

His high-flown ambitions led him to pursue a career in politics.

This restaurant serves high-grade sushi.

She has a high-keyed voice.

She has a high-level position in the company.