variable
adjective
uk/ˈveəriəbl/ usable to change or be changed:
50% of the restaurant manager's remuneration was variable.
Returns are variable but can rise to as much as 9%.
Those who bought variable annuities a few years ago are already losing money on them.
not always of the same level or standard:
Internet phone call quality can be wildly variable.
The new chips have turned out to be of variable quality.
variable
noun [ C ]
uk/ˈveəriəbl/ usa number, amount, or situation that can change and affect something in different ways:
Right now, there are too many variables for us to make a decision.