indispensable

indispensable — adjective

1. used to describe a person or thing that is needed so urgently that no other pers

1.adjectiveB2
Definition

used to describe a person or thing that is needed so urgently that no other person or thing can replace them in doing a particular job or achieving a result.

Example

Nora's laptop became indispensable after she started working from home.

become + indispensable + after [event]

A reliable map is an indispensable tool for any mountain rescue team.

indispensable + noun (tool) + for [purpose]

Common collocations
  • indispensable to
  • indispensable for
  • prove indispensable
  • become indispensable
  • absolutely indispensable
  • virtually indispensable
  • indispensable part of
  • indispensable tool
Synonyms
  • essential

    The closest synonym; slightly less emphatic and more common in both spoken and written English

  • vital

    Similar strength but often used for life-or-death contexts or things that keep a system alive

  • crucial

    Focuses on the decisive importance of something at a particular moment or for a specific outcome

  • necessary

    More general and less emphatic; covers a wider range of needs from basic to urgent

Antonyms
  • dispensable

    The direct antonym — something that can be given up or done without

  • unnecessary

    Something not needed at all, a weaker opposite

  • replaceable

    Someone or something that can be substituted without loss

Grammar Patterns

indispensable + to + [someone/something]

indispensable + for + [purpose/activity]

Usage Note

Frequently paired with the prepositions 'to' (identifying who needs the person or thing) and 'for' (identifying the goal or purpose). This word carries a stronger sense of necessity than 'essential' — it suggests that the whole system or effort would break down without that person or thing.

Common Mistakes

She is indispensable' (without specifying for whom or what).
She is indispensable to the team.
'indispensable' needs context to sound natural; specify who needs the person or for what purpose.
Milk is indispensable for my coffee.' (too trivial).
Good management is indispensable for running a successful company.
'indispensable' sounds unnatural for everyday needs; use 'essential' or 'necessary' instead.

Word family

  • indispensably
    adverbC1
  • indispensability
    nounC1
  • dispensable
    adjectiveC1
  • dispense
    verbB2

Synonym discussion

Sense: adjective/1

All four words describe something important, but 'indispensable' is the strongest — it means you literally cannot function or complete the task without the person or thing. 'Essential' is the closest synonym and works well in most contexts: 'Sunlight is essential for plants to grow.' 'Vital' comes from the Latin for 'life' and suits life-or-death or critical system contexts: 'Clean water is vital for public health.' 'Crucial' highlights a decisive moment or turning point: 'This meeting is crucial for the merger.' 'Necessary' is the most everyday word and the least emphatic, covering everything from trivial needs to serious requirements: 'A visa is necessary to enter the country.' In professional writing, use 'indispensable' to stress irreplaceable value, but choose 'essential' or 'necessary' for routine statements.

essential ↗vital ↗crucial ↗necessary ↗

Common collocations

Nouns

  • indispensable part
  • indispensable tool
  • indispensable member
  • indispensable resource
  • indispensable component

Adverbs

  • absolutely indispensable
  • virtually indispensable
  • almost indispensable
  • truly indispensable

Phrases

  • prove indispensable
  • become indispensable
  • make oneself indispensable
  • consider someone indispensable

Prepositions

  • indispensable to
  • indispensable for

Etymology

LatinEnglish

Comes from Latin 'indispensabilis', a combination of 'in-' (not) and 'dispensare' (to weigh out, distribute, manage). In medieval Latin, 'indispensabilis' meant something that could not be set aside or exempted. English adopted the word in the early 1600s, and by the mid-1600s it had taken on its modern meaning of 'absolutely necessary — cannot be done without.'