variably Definition

variable
adj

1. Referring to something that varies or tends to vary; not steady or regular; changeable.

Thesaurus: fickle, mutable, inconstant, unsteady, fitful, shifting, fluctuating, vacillating, volatile, labile.
2. Referring to something that can be varied or altered.

noun

1. A thing that can vary unpredictably in nature or degree.
2. A factor which may change or be changed by another.
3. math.
In an algebraic expression or equation: a symbol, usually a letter, for which one or more quantities or values may be substituted, eg in the expression 3x, x is a variable.
4. astron.
A variable star.

Derivative: variability
noun

Derivative: variably
adverb

Etymology: 14c: French, from Latin variabilis, from variare to vary.