grammatical

Từ điển Oxford Advanced Learner 8th

gram·mat·ical BrE [ɡrəˈmætɪkl] NAmE [ɡrəˈmætɪkl] adjective
1. connected with the rules of grammar
•a grammatical error
2. correctly following the rules of grammar
•That sentence is not grammatical.
Derived Word: ↑grammatically

Word Origin:
[grammatical grammatically] early 16th cent.: from late Latin grammaticalis, via Latin from Greek grammatikos, from gramma, grammatos ‘letter of the alphabet, thing written’.

• Từ đồng nghĩa / Synonyms:
  well-formed, grammatic
• Từ trái nghĩa / Antonyms:
  ungrammatical, ill-formed