Tom was perilously close to the edge of the cliff.

Whose broad stripes and bright stars, thro’ the perilous fight, o’er the ramparts we watched were so gallantly streaming.

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

This could have perilous diplomatic consequences.

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

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.

A secret cove was hidden by perilous-looking rocks.

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

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

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).