grammaticalize

To make grammatical.

Enhanced output arises when learners grammaticalize their output either through the use of more advanced interlanguage forms or of target language forms.

It is only later that learners begin to grammaticalize their speech. According to N. Ellis (1996), they do this by extracting rules from the items they have learned—bootstrapping their way to grammar.

To integrate into a system of grammar; to make (something such as a constraint) an element or rule of grammar, to cause (something) to be required by grammar.

That is, the cooccurrence restrictions do cross intervening specifications for the same feature. […] In the model, a linguistic constraint against homorganicity (which may grammaticalize constraints on motor programming) is enforced on pairs […]

... Udmurt, Turkish, and Yucatec Mayan to test (and critique) the hypothesis that possessives grammaticalize into definite articles.

To cause (a word, a suffix, etc) to undergo grammaticalization.

Similarly to other classifier languages in South America and elsewhere, a number of nouns grammaticalize as classifiers and are also used as derivational suffixes, e.g. *-maka 'stretch (of cloth)' (from *maka “hammock'), […]

Items that grammaticalize become more productive in the sense that the grammaticalizing element occurs with increasingly large numebrs of categories. […] Clearly, lexicalization is far less constrained by various types of linguistic processes than grammaticalization is.