synesis

A construction in which a form, such as a pronoun, differs in number but agrees in meaning with the word governing it, as in If the group becomes too large, we can split them in two.

In grammar and rhetoric, construction according to the sense, in violation of strict syntax.

A construction in which adherence to some element in the sense causes a departure from strict syntax, as in “Philip went down to Samaria and preached Christ unto them.”