반의어 (ban-ui-eo) translates to "antonyms" or "opposite words". These are words with meanings that are directly opposite to each other.
크다 (keu-da) - "big" vs. 작다 (jak-da) - "small"
많다 (man-ta) - "many" vs. 적다 (jeok-da) - "few"
빠르다 (ppa-reu-da) - "fast" vs. 느리다 (neu-ri-da) - "slow"
높다 (nop-da) - "high" vs. 낮다 (nat-da) - "low"
Example in a sentence:
오늘은 날씨가 더워요, 어제는 추웠어요. Oneul-eun nal-ssi-ga deowoyo, eoje-neun chuwosseoyo.) 
"Today the weather is hot, yesterday it was cold."
Learning Tips:
Flashcards: Use flashcards to memorize pairs of opposite words.
Practice: Write sentences using pairs of antonyms to understand their context better.
Here is a test. Find the opposite verbs in these sentences and leave them in the comments! No cheating!
Example 1: level 1
문을 열어요.
창문을 닫아요.
Example 2: level 1
선물을 줘요.
선물을 받아요. 
Example 3:  level 2
나는 학교에 가요.
그는 집에 와요.
Example 4: level 3
아기가 태어났어요.
그는 작년에 죽었어요. 
Example 5: level 3
아침에 일찍 일어나요.
피곤해서 잠시 눕겠어요. 
                                      
                                          
                                   
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Learn Korean - For Beginners [ Monthly Update ]
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