Tense Consonants: ㄲ ㄸ ㅃ ㅆ ㅉ

Korean has three versions of many consonant sounds: plain (가, relaxed, no puff), aspirated (카, a strong puff of air), and now tense (까, tight and clipped). To make a tense sound, squeeze your throat and hold it tense for a split second — no puff of air escapes, and the sound comes out short and sharp, almost like you're gritting your teeth. English hints at this in words like sky, stop, and spy, where the 'k', 't', and 'p' are unaspirated compared to kite, top, and pie. This three-way contrast is genuinely the hardest part of Hangul pronunciation for English speakers, so don't worry if 가/카/까 sound identical at first — your ear will adjust with practice.

Each tense consonant is written by doubling its plain partner: ㄲ = two ㄱ, ㄸ = two ㄷ, ㅃ = two ㅂ, ㅆ = two ㅅ, and ㅉ = two ㅈ. Their names follow the same pattern too — 쌍기역, 쌍디귿, and so on, where 쌍 means 'twin' or 'pair'. Think of the doubling as a visual cue: double the letter, double the muscle tension in your throat when you say it.