prefixable

As a noun terms

is .

As an adjective prefixable is

capable of being added as a prefix.

As a noun prefix

is that which is prefixed; especially one or more letters or syllables added to the beginning of a word to modify its meaning; as, pre- in prefix, con- in conjure.

As a verb prefix

is to determine beforehand; to set in advance.

As an adjective prefixable is

capable of being added as a prefix.