generative

hedelmällinen

lisääntymis- Having the power of generating, propagating, originating, or producing.
That generative particle. — Bentley
(quote-book)

Of course, structures like those associated with (36) and (37) constitute only a tiny subset of the infinite set of well-formed sentence structures found in English. We can increase the Generative Capacity of our grammar ( = the set of structures which it generates) either by expanding the Lexicon on the one hand, or by expanding the Categorial Rules (i.e. Phrase Structure Rules) on the other.