adjective

perilous

PAIR-uh-lus/ˈperələs/

Full of danger or serious risk.

The crumbling cliff path presents a perilous route above the deep drop.

A hiker halted at a crumbling cliff path looks across loose stones and a deep drop, serious peril apparent, safely away from edge.
Etymology

Periculum supplies the danger, and the suffix characterizes something as full of it. Perilous describes circumstances that expose someone to harm, including death, destruction, or injury.

In context

Love Nature: Predators43:59
A perilous road lies ahead for these youngsters. Only half of them will survive their first year
Springbok & Impala: The Unsung Heroes of Africa’s Plains | Wildlife Icons 106

More examples

  • They began a perilous journey across the desert.
  • Rising debt puts the company in a perilous financial position.
  • Climbing the cliff without ropes is perilous.

Forms

perilous

peril noun — Serious danger or risk of harm.

perilously adverb — In a way involving serious danger.

Similar words

dangerous
Dangerous covers any threat of harm, not necessarily extreme risk.
hazardous
Hazardous often describes unsafe conditions, materials, or work environments.
risky
Risky can involve minor losses, not just serious danger.