Varyable

Varyable is a nonstandard adjective formed from the verb vary with the suffix -able. In formal English, the standard forms are variable and varying. Varyable is rarely used in reputable technical writing and is typically treated as a misspelling or neologism.

The proposed meaning would be "capable of varying" or "subject to variation." This is distinct from "variable" (a noun for a quantity that can assume different values, or an adjective describing such a property) and "varying" (changing or fluctuating).

Because of its nonstandard status, varyable appears mainly in informal contexts, typographical errors, or creative writing. In mathematics, statistics, and programming, writers should prefer "variable" or "varying" to avoid ambiguity.

Examples: "A varyable parameter" would be clearer as "a variable parameter" or "a parameter that can vary." "The varyable component of the system" is better rendered as "the variable component of the system."

See also: variable, variability, variation, vary (verb).