걱정이 · 걱정을
worry, concern
Example
시험 걱정 때문에 어젯밤에 잠을 못 잤어요.
I couldn't sleep last night because I was worried about the exam.
Word parts
Becomes verbs easily: 걱정하다 (to worry), 걱정되다 (to feel worried).
Good to know
Pronounced [걱쩡]; 걱정 마세요 is the everyday way to say 'Don't worry.'