Due to overfishing, some fish stocks are now at perilously low levels.

This could have perilous diplomatic consequences.

Tom was perilously close to the edge of the cliff.

Life is short, and Art long; the crisis fleeting; experience perilous, and decision difficult.

After braving perilous seas and navigating through what are now known as the Straits of Magellan, Magellan's small fleet entered an unfamiliar ocean in Nov. 1520. He called this body of water pacific, due to the calmness of the water at the time ('pacific' means peaceful).

A coward is someone who, in a perilous emergency, thinks with his legs.

The top spun perilously close to the edge of the table.

A grove stood in the city, rich in shade, / where storm-tost Tyrians, past the perilous brine, / dug from the ground, by royal Juno's aid, / a war-steed's head, to far-off days a sign / that wealth and prowess should adorn the line.

Learning without thought is labor lost; thought without learning is perilous.

A secret cove was hidden by perilous-looking rocks.