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perilous

perilous

43 7.5
Full of danger that could cause harm
  • adjective
  • /ˈpɛrɪləs/
translation icon : peligroso
  • Plus, the mines can be perilous.
  • a perilous journey
  • a perilous situation
  • a perilous position

But the consequences can be a perilous polarization.

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Examples

  • Most refugee journeys are long and perilous, with limited access to shelter, water or food.

  • Dr. Lee, our doctor, said they both were in a perilous condition.

    Fiction book (1993)
  • It's perilous to live alone.

  • Of course, such encounters are never easy and, in fact, are often perilous.

    Academic text (2015)
  • Believe me when I say you are embarking on your most challenging and perilous adventure yet.

    Fiction book (1992)
  • The realm of Faery could be perilous, and its people fierce.

    Fiction book (2002)
  • We denounce his candidacy and believe it to be perilous for our country.

  • They lived in a very perilous time between the two world wars, and there were a lot of trends in culture which were going that way.

  • Many climbers underestimate the perilous conditions on high-altitude mountains.

  • Crossing the busy highway at night can be extremely perilous for pedestrians.

Synonyms

dangerous
vsperilous
1.5

Likely to cause harm or injury

is more intense, implying a very high level of danger
risky
vsperilous
269 3.6

Likely to cause loss, harm, or danger

is narrower, referring to very serious physical danger rather than varied risks
hazardous
vsperilous
98 5.2

Likely to cause harm or danger

is stronger, stressing extreme danger rather than general risk
unsafe
vsperilous
93 1.1

Likely to cause harm to people or damage to things

is stronger, highlighting severe or immediate hazard rather than mere unsafety
precarious
vsperilous
47 7.6

In a dangerous, unstable position likely to fall or fail

is broader, applying to extreme danger beyond unstable positions
treacherous
vsperilous
38 7.1

Unstable ground, water, or weather that can suddenly become dangerous

covers danger more generally, not mainly instability or betrayal
dicey
vsperilous
  • Informal
30 8.5

Likely to be risky or dangerous because the outcome is uncertain

is more formal and stresses clear, serious danger rather than unpredictability
touch-and-go
vsperilous
  • Informal
9 7.2

A situation that is dangerous or uncertain until the last moment

is more general, applying to any very dangerous case not only last‑minute doubt
parlous
vsperilous
  • Literature
1 9.9

Full of danger or likely to cause harm

focuses more on very great danger than on uncertainty

Antonyms

1.0

Not likely to be harmed or in danger

318 3.2

Protected from danger or from people trying to break in

Compounds

Siege Perilous
  • Literature
1 9.9

A seat at the Round Table for the knight meant to find the Holy Grail, deadly to others

How Dangerous

perilous
43 7.5
dangerous
1.5
hazardous
98 5.2
risky
269 3.6

Surface Forms

perilous positive
perilouser comparative
perilousest superlative

Morphology

perilous = peril (transparent) = peril + ous

The adjective is clearly formed from the noun 'peril' with the productive suffix '-ous' meaning 'full of' or 'characterized by'.

Etymology

The word perilous comes from the same root as peril and the old Latin word periculum, which means 'danger'. So perilous simply means 'full of danger' or very risky.