Intermediate (B1)
IPA: /ˌɪn.dɪsˈpɛn.sə.bəl/
KK: /ɪnˈdɪspənəbl/
Definition
Something that is absolutely necessary and cannot be done without.
Example
Water is indispensable for all forms of life.
Conversation

Have you read that book on time management yet?

Not yet, but I hear it's indispensable for staying organized.

I really think you should check it out; it has some great tips.

Definitely! I want to make sure I'm using my time effectively.
Synonyms & Antonyms
Antonyms
dispensable
unnecessary
optional
Definition
A person or thing that is absolutely necessary or essential.
Example
In a team, a good leader is often seen as indispensable for success.
Conversation

I think having a good mentor is truly indispensable in any career.

Absolutely! They guide you through tough decisions.

Right? I feel like their experience can save you from making mistakes.
Root Explanation
Indispensable → It is formed from "in-" (meaning not) and "dispensabilis" (from Latin, meaning able to be dispensed or spared). The word "indispensable" means something that cannot be spared or is absolutely necessary.
Memory Tip
Think of something that is 'not' ('in-') able to be 'spared' — that's why indispensable means it is absolutely necessary.
Visually Confused Words
undispensable
dispensable
disenable
independable