

밖이 추우니까 두껍게 입으세요.
[pak͈i t͡ɕʰuunik͈a tuk͈ʌpk͈e ipɯsejo.]
It's cold outside, so dress warmly.
이 책은 생각보다 두껍지 않아요.
[i t͡ɕʰɛkɯn sɛŋkakp͈ota tuk͈ʌpt͈͡ɕi anajo.]
This book isn't as thick as I thought.
겨울 이불이 정말 두꺼워요.
[kjʌul ipuli t͡ɕʌŋmal tuk͈ʌwʌjo.]
The winter blanket is really thick.
"두껍다" is in the lesson "Adjectives 3" (Level 7), along with 13 other useful words. LinDuo has 180 topic lessons like this one, 2,380 words in total. Every word has an illustration, a transcription and pronunciation in a female and a male voice. Just 10–15 minutes a day is enough to learn them all. Free, and works offline.