noun, noun or participle which takes 'suru', intransitive verb
Describes repeated or alternating upward and downward movement, often of prices, levels, or physical objects. Can be used as a noun or with する to mean 'to go up and down'.
株価の上がり下がりに一喜一憂する。
I get alternately elated and depressed by the rise and fall of stock prices.
Going up and down these stairs is tough.