What is the verb form of indispensable?

The verb form of "indispensable" is indispense. However, it is rarely used in modern English.

Instead of "indispense," you would usually use other verbs to convey the same meaning, such as:

* Need: "We need this software for our project."

* Require: "The task requires a team of experts."

* Essential: "This step is essential to the success of the plan."

* Cannot do without: "We cannot do without the internet these days."

While "indispense" technically exists, it is best to avoid it in most situations.