indispensable
/ˌɪndɪˈspɛnsəbəl/
adjective
- Absolutely necessary or essential; cannot be done without.
- A good dictionary is indispensable for learning a new language.
- Her calm leadership was indispensable during the crisis.
- Water is indispensable for all forms of life.
Antonyms
noun
- A person or thing that is absolutely necessary or essential.
- In the kitchen, a sharp chef's knife is an indispensable.
- She quickly became an indispensable to the team because of her problem-solving skills.
- For a long hike, a map and compass are indispensables.