indispensable

/ˌɪndɪspˈɛnsəbə‍l/

/ˌɪndɪˈspɛnsəbəɫ/

indispensable

absolutely necessary, essential, vital, or crucial, to the point that being replaced or substituted is not possible

radiography using X-rays and xerographic (rather than roentgenographic) techniques

absolutely necessary; vitally necessary

synonyms : essential

unavoidable

Examples

1. A tractor is an indispensable piece of equipment on a large farm.

2. Forests and forest products are indispensable.

3. A good hair stylist is indispensable.

4. The 1850 slave census is indispensable.