connected with the rules of grammar 语法的；文法的 a grammatical error 语法错误
correctly following the rules of grammar 符合语法规则的；合乎文法的 Oxford Collocations Dictionaryverbs- be
- perfectly
Word Originearly 16th cent.: from late Latin grammaticalis, via Latin from Greek grammatikos, from gramma, grammatos ‘letter of the alphabet, thing written’.