Level 6 · word 15,565 of 20,000

ail

/ˈeɪl/ American
  • v. 使苦恼, 生病
Definition
  • v. to cause trouble or pain to someone, or to be sick
Example
He wondered what could ail his usually cheerful dog.
他不知道自己那只平时活泼的狗到底怎么了。