stairstep
1 of 3noun
1
: a step in a flight of stairs
2
stairsteps plural : a flight of stairs
stairstep
2 of 3intransitive verb
"
: to move up or down like the steps in a stairway
narrow streets stairstep up the slopes 
Geography School Bulletin
Geography School Bulletinstair-step
3 of 3adjective
: resembling the steps in a stairway
stair-step levels of terrain
especially : moving up or down like steps in a stairway
stair-step inflation
Word History
Etymology
Noun
stair + step