Stair

1.

(One of a flight of fixed steps, a flight of steps, staircase) ថ្នាក់, ជាន
Example: Somsari passed me on the stair. one stair at a time កាំជណ្ដើរ, reached by a stair ជណ្ដើរ, pl. go up the stair ជណ្ដើរ

1.

One step of a series for ascending or descending to a different level; -- commonly applied to those within a building.

2.

A series of steps, as for passing from one story of a house to another; -- commonly used in the plural; but originally used in the singular only.