StairMaster

[ stair-mas-ter, ‐mah-ster ]
/ ˈstɛərˌmæs tər, ‐ˌmɑ stər /

Trademark.

an exercise machine that allows the user to go through the motions of climbing stairs.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019