indispensable
/ˌɪn.dɪˈspɛn.sə.bəl/So necessary or important that you cannot manage without it. If something is indispensable, removing it would cause serious problems. It is often used for people, tools, or skills that are truly irreplaceable.
- Good communication skills are indispensable in any workplace.
- Water is indispensable for all forms of life on Earth.
- She quickly made herself indispensable to the research team.
Adinary Nuance
Indispensable sits in a tight cluster with essential, vital, crucial, and necessary — but they are not freely interchangeable. Necessary is the weakest: it just means something is required. Essential is stronger and broader, covering anything that forms a core part of something. Vital adds a sense of urgency, often implying life-or-death stakes. Crucial emphasizes a turning-point moment where the outcome depends on one factor. Indispensable is the strongest claim of all: it means the person or thing truly cannot be removed or replaced without the whole thing falling apart. For this reason, it is especially powerful when talking about people in roles — "she is indispensable to the team" implies no one else could fill her place.
In other languages
- Vietnamese
- Không thể thiếu
- Spanish
- Indispensable
- Chinese
- 不可或缺的
- Japanese
- 不可欠な
- Korean
- 없어서는 안 될
Etymology
From Latin "indispensabilis," combining "in-" (not) and "dispensare" (to do without or dispense). The word entered English in the late 16th century, originally in theological and legal contexts before broadening to general use.
Common phrases
Synonyms
Related words
Frequently asked questions
- What is the difference between 'indispensable' and 'essential'?
- 'Essential' means something is a core requirement, while 'indispensable' is stronger — it means the thing or person cannot be replaced or removed at all. Use 'indispensable' when you want to say nothing else could fill that role.
- Is 'indispensable' a formal word?
- Yes, it leans formal and is common in academic writing, IELTS essays, and professional contexts. It is less common in casual everyday conversation, where people might simply say 'we can't do without it'.
- Can 'indispensable' describe a person?
- Absolutely. Saying someone is 'indispensable' is actually one of its most powerful uses — it means the team or organization could not function properly without them.
- Is 'indispensable' a good word to use in IELTS writing?
- Yes. It is a high-level academic adjective that shows strong vocabulary range. Use it precisely when you argue that something truly cannot be removed — for example, in essays about education, technology, or society.