* Principle: ① From top to bottom ② From left to right ㄲ, ㄸ, ㅃ, ㅆ, and ㅉ, which represent tense sounds, are called 'doubled consonants(쌍자음)'. For example, ㄱ is referred to as '기역[gi-yuk]', and then its doubled consonant ㄲ as '쌍기역[ssang-gi-yuk]'. Just write a consonant ㄱ, ㄷ, ㅂ, ㅅ, or ㅈ once more next to the basic one, then that's 쌍자음. Let's practice with some easy words. 새[sae]: bird 얘기[yae-gi]: ..
