Crossword clue: not capable of being used as a term by itself; -- said of words, as an adverb or preposition.
1 answer found in Letterora's clue database (Wikidata facts, Open Trivia DB, WordNet and Webster definitions — all licensed sources).
Possible answers
of a term that cannot stand as the subject or (especially) the predicate of a proposition but must be used in conjunctio