stair
stair
UK[steə(r)]US[ster]
n
A step in a series of steps forming a flight of stairs.
n
(plural) A set of steps leading from one floor of a building to another.
Etymology
The word 'stair' originates from the Old English 'stǣger', meaning a flight of steps or a staircase. This term is derived from the Proto-Germanic 'staigri-', which is related to the verb 'stīganą', meaning 'to ascend' or 'to climb'. This verb family can be traced back to the Proto-Indo-European root 'steygʰ-', carrying the core sense of 'to stride, to step, to rise'. Thus, the modern abstract meaning of a single step or a series of steps is a direct and logical evolution from this ancient concept of the action of climbing.
Analysis
The word 'stair' is a simplex word of Old English origin. It does not contain separable, meaningful morphemes in its modern English form.
Examples
She sat on the bottom stair to tie her shoelaces.
The old wooden stairs creaked with every step.
He took the stairs two at a time to reach the top floor quickly.