unnatural

unnatural — adjective

1. very different from what people normally think of as usual or acceptable, often

1.adjectiveB2
Definition

very different from what people normally think of as usual or acceptable, often in a way that seems wrong or disturbing

Example

Diego felt uneasy at the unnatural orange glow in the sky before the storm.

unnatural + abnormal natural phenomenon

The sudden silence in the busy classroom felt unnatural to the new teacher.

Common collocations
  • unnatural glow
  • unnatural silence
  • unnatural color
  • unnatural reaction
  • unnatural growth
Synonyms
  • abnormal

    more clinical or statistical; used in medical and scientific contexts

  • unusual

    milder in tone; simply means not common, without the negative judgment

  • freakish

    stronger and more dramatic; suggests something strikingly and disturbingly abnormal

Antonyms
  • normal

    conforming to the usual or expected pattern

  • natural

    in accordance with nature or normal expectations

Grammar Patterns

unnatural + noun

feel/look/seem unnatural

it is unnatural (for someone) to-infinitive

Usage Note

Commonly describes events, physical appearances, or situations that deviate noticeably from what is expected. Less commonly used for deliberate human behavior — see sense 2 for that use.

Common Mistakes

The ghost story described supernatural events that felt wrong.
The ghost story described unnatural events that felt wrong.
'Supernatural' means beyond nature (magic, paranormal); 'unnatural' means deviating from what is normal or expected.
It felt abnormal for her to arrive early.
It felt unnatural for her to arrive early.
'Abnormal' has a clinical or statistical tone; 'unnatural' emphasizes deviation from expected patterns in everyday situations.

2. behaving, speaking, or performing in a way that seems forced or put on rather th

2.adjectiveB2
Definition

behaving, speaking, or performing in a way that seems forced or put on rather than genuine and relaxed

Example

Priya could tell the manager's praise was unnatural because his eyes showed no real warmth.

unnatural + forced emotion or praise

Theo's loud laugh sounded so unnatural that everyone in the room turned to look.

sound unnatural + laugh

Common collocations
  • unnatural smile
  • unnatural laugh
  • unnatural tone
  • unnatural manner
  • stiff and unnatural
Synonyms
  • affected

    suggests deliberate pretension; often used to describe speech or manners

  • forced

    emphasizes effort rather than genuine feeling; common with 'smile' or 'laugh'

  • contrived

    suggests something was planned or staged rather than spontaneous

Antonyms

Grammar Patterns

unnatural + noun (smile/laugh/tone)

sound/look/seem unnatural

find something unnatural

Usage Note

Restricted to describing human behavior — speech, facial expressions, laughter, gestures, or performance. Not used for objects, events, or natural phenomena (see sense 1 for those uses).

Common Mistakes

Her unusual laugh drew everyone's attention.' (when meaning fake/forced).
Her unnatural laugh drew everyone's attention.
'Unusual' just means not common; 'unnatural' means forced or fake.

Word family

Synonym discussion

Sense: adjective/1

All four words describe something that deviates from the norm, but they differ in tone and context. Abnormal is the most clinical; it is common in medical, psychological, and statistical writing (abnormal test results, abnormal behavior) and carries a neutral-to-concerned tone. Unusual is the mildest and most versatile — it simply means 'not common' and can be positive, neutral, or slightly curious (an unusual color, an unusual hobby). Freakish is stronger and often negative, suggesting something strikingly odd or unnatural in a dramatic way (a freakish storm, a freakish coincidence). Extraordinary is mostly positive or impressive, pointing to something remarkably above the ordinary (extraordinary talent, extraordinary effort). If you want to say something is wrong or disturbing rather than just rare, unnatural or abnormal fits best. For everyday oddities, unusual is the safest choice.

abnormal ↗unusual ↗freakishextraordinary ↗

Common collocations

Nouns

Adverbs

Phrases

  • feel unnatural
  • look unnatural
  • seem unnatural
  • sound unnatural
  • find something unnatural
  • it is unnatural for someone to

Etymology

LatinOld FrenchEnglish

Derived from the prefix 'un-' (meaning 'not') attached to 'natural', which comes from Old French 'naturel' and Latin 'naturalis' ('by birth, according to nature'). The Latin root 'natura' ('birth, nature') itself comes from 'nasci' ('to be born'). The word entered English in the late 14th century and has carried the sense of 'contrary to the ordinary course of nature' since its earliest recorded uses.