===== Synonyms & Antonyms =====
**What it is:** Synonyms = similar meaning; Antonyms = opposite meaning.  
**What it’s for:** Avoid repetition and choose the right tone.  
**Example:** big (synonym: large) / big (antonym: small)

===== Notes =====
  * Synonyms are not always 100% the same:
    - **big** (general) vs **huge** (very big)
  * Learn them with example sentences to see the difference.

===== Starter set =====
  * happy → glad / joyful ; antonym: sad
  * important → essential ; antonym: unimportant
  * increase → rise ; antonym: decrease

===== Hard words (Glossary) =====
  * *synonym* /ˈsɪnənɪm/: từ đồng nghĩa
  * *antonym* /ˈæntənɪm/: từ trái nghĩa
  * *tone* /təʊn/: sắc thái (văn phong/cảm xúc)
  * *repetition* /ˌrepəˈtɪʃən/: sự lặp lại