The Collaborative International Dictionary
Adjectiving
Adjective \Ad"jec*tive\, v. t. [imp. & p. p. Adjectived; p. pr. & vb. n. Adjectiving.] To make an adjective of; to form or change into an adjective.
Language has as much occasion to adjective the distinct
signification of the verb, and to adjective also the
mood, as it has to adjective time. It has . . .
adjectived all three.
--Tooke.
Wiktionary
adjectiving
vb. (present participle of adjective English)