Common error 56: hyperventilate vs. hypoventilate

hyperventilate: to breathe at an abnormally rapid rate

hypoventilate: to breathe at an abnormally slow rate

Common error 55: Hyperthermia vs. Hypothermia

hyperthermia: having an abnormally high body temperature 이상(異常) 고열

hypothermia: having an abnormally low body temperature 저체온(증)

Idiom 156: bite one's tongue

하고 싶은 말이 있어도 꾹참는다는 표현입니다. 나중에 후회하는 말을 삼가하는 것이 좋겠지요. 특히 아이들에게나 사랑하는 사람에게.

bite one's tongue = keep oneself from speaking

I had to bite my tongue in order not to tell him that he won the raffle.

raffle = lottery