要害

vital part / (fig.) key point / crucial

to demand / to request / to coerce

important / vital / to want / to ask for / will / going to (as future auxiliary) / may / must / (used in a comparison) must be / probably / if

(bound form) to demand; to coerce

to want; to need; to ask for / will; shall; about to / need to; should / if (same as 要是[yao4 shi5]) / (bound form) important

to do harm to / to cause trouble to / harm / evil / calamity

to hit the target and do real damage (idiom) / fig. to hit where it hurts / fig. to hit home / an argument that hits the nail on the head

to hit the nail on the head (idiom)