mainstep
nounUK /ˈmeɪn.stɛp/
US /ˈmeɪn.stɛp/
The main step is the most important step you take to do something.
Learning the letters is the mainstep to reading a book.
OTHER MEANINGS
2. The central stair in a set of stairs.
She waited on the mainstep for her friend to arrive.
3. The most important part of a plan or process.
Saving money is the mainstep in buying a new bike.
4. A main level or platform you stand on.
The dancers stood on the mainstep of the stage.