syntactically

Etymology

syntactic + -ally

adv

1. According to the rules of syntax.
   Thus, there is a third kind of judgment, which we shall call characterization. The wa-phrase and ga-phrase serve syntactically to distinguish predicational judgment not only from nonpredicational description but also from characterizational judgment. 1965-06-04, Shigeyuki Kuroda, “Generative grammatical studies in the Japanese language”, in DSpace@MIT, retrieved 2014-02-24
   The sentence was syntactically correct, but made no sense.