[...] language is productive; that is, language users can produce and understand novel utterances. Specifically, there are qualitatively distinct classes of productivity: syntactic productivity, which reflects the potential to combine words in novel ways; morphological productivity, illustrated by the speaker's ability to create new words out of existing morphemes (e.g., "my musical tastes are pre-Bachian"); and phonological productivity, which can be seen in the speaker's recognition that certain combinations of sounds, although nonwords, are nonetheless well-formed sequences (e.g., "snurk").
- Dell (2004), Pag. 129