unused

unused — adjective

1. describing something that is not currently being used, or has never been used at

1.adjectiveB1
Definition

describing something that is not currently being used, or has never been used at all — for example, a ticket that was bought but never taken to the gate, or a room that has been empty for months.

Example

Tomás found three unused train tickets in his coat pocket.

attributive position: unused + noun

The spare bedroom has been unused since Ilan moved out.

predicative position: be + unused

Common collocations
  • unused ticket
  • unused room
  • unused capacity
  • unused equipment
  • unused land
  • unused gift card
  • unused vacation days
  • sit unused
  • remain unused
  • go unused
Synonyms
  • idle

    focuses on temporary inactivity, often of machines, factories, or resources

  • vacant

    emphasises that a space (room, seat, building) is empty and available

  • new

    for items that have never been opened or worn; overlaps with the 'never used' sub-meaning

  • unoccupied

    slightly more formal; used for buildings, seats, or land

Antonyms
  • used

    the direct opposite: having been put to use

  • occupied

    opposite of vacant; someone or something is actively using the space

Usage Note

Can appear before a noun (an unused ticket) or after a linking verb (the ticket is unused).

Common Mistakes

The hotel room is unused-to guests.
The hotel room is unused.
The 'unused to' pattern (sense 2) only applies to people who are not accustomed to something.

2. not comfortable with or experienced in a particular situation, activity, or cond

2.adjectiveB2
Definition

not comfortable with or experienced in a particular situation, activity, or condition — for example, someone who has lived in a hot climate for years and is unused to snow.

Example

After years working indoors, Hiro was unused to standing for long hours.

pattern: unused to + gerund

Sirin was unused to the dry desert heat and drank water all day.

pattern: unused to + noun phrase

Common collocations
  • unused to the cold
  • unused to the heat
  • unused to the noise
  • unused to the pace
  • unused to working
  • unused to living
  • unused to dealing with
  • completely unused to
  • still unused to
Synonyms
  • unaccustomed

    slightly more formal; interchangeable in most contexts

  • not used to

    the common alternative in everyday speech; same meaning and grammar

  • unfamiliar with

    focuses on lack of knowledge rather than lack of comfort; can modify nouns

  • new to

    less formal; emphasises recent exposure (e.g., 'new to the job')

Antonyms
  • accustomed to

    the direct opposite: comfortable with something through experience

  • used to

    the everyday opposite; familiar and comfortable with a situation

Grammar Patterns

unused + to + noun

unused + to + gerund

Usage Note

Used only predicatively (the person is unused to something), never before a noun. The 'to' is a preposition, so it can be followed by a noun or a gerund (unused to getting up early), never by a bare infinitive.

Common Mistakes

She is unused to wake up early.
She is unused to waking up early.
After 'to' (preposition), use a gerund, not an infinitive.

Word family

Synonym discussion

Sense: adjective/1

All four words describe something not in active use, but they focus on different angles. Unused is the broadest — it covers anything from a never-opened gift card to an empty building. Idle often carries a judgement of wasted potential (idle machines, idle workers) and usually implies the thing could be running. Vacant and unoccupied are mostly about spaces a person could fill: a vacant hotel room, an unoccupied seat. Vacant also has a legal/formal tone (vacant property). Unoccupied is more neutral and temporary (an unoccupied table). For everyday objects like a ticket or a blanket, unused is the natural choice. Compare: The factory stands idle (waiting for work) vs The factory sits unused (simply not used, no judgement).

unused ↗idle ↗vacant ↗unoccupied ↗

Common collocations

Nouns

Adverbs

Phrases

  • sit unused
  • remain unused
  • go unused
  • leave something unused

Etymology

LatinOld FrenchMiddle EnglishEnglish

Formed in Middle English by adding the prefix un- (meaning 'not') to used, the past participle of use. The verb use comes from Old French user, which traces back to Latin uti, meaning 'to employ, make use of'. The sense of 'not accustomed' (unused to) appeared in the 1500s.