The Collaborative International Dictionary
Predicatively
Predicative \Pred"i*ca*tive\, a. [L. praedicativus.] Expressing affirmation or predication; affirming; predicating, as, a predicative term. -- Pred"i*ca*tive*ly, adv.
Wiktionary
predicatively
adv. As a predicate; giving information about the subject of a sentence.
WordNet
predicatively
adv. occuring within the predicate phrase; "predicatively used adjectives"
Usage examples of "predicatively".
But when the adjective comes immediately in front of the noun it describes, it must normally be assumed that it is used attributively and not predicatively.
In German, adjectives do agree in number when they are used attributively, but adjectives used predicatively do not.
LR:47 would seem to indicate that in Quenya, adjectives agree in number also when they are used predicatively.