necessarystep

noun
UK /ˈnɛsəsəri stɛp/
US /ˈnɛsəˌsɛri stɛp/

A thing you must do to get something done.

Learning the alphabet is a necessary step to reading books.


OTHER MEANINGS

2. A stage in a process that cannot be skipped.

Washing your hands is a necessary step before cooking.

3. An action that is needed for safety or success.

Checking the brakes is a necessary step before a long drive.

4. A part of a plan that must happen first.

Saving money is a necessary step toward buying a bike.