Expresses that an event is unlikely or improbable to occur

To lack the skill or knowledge to do something; to have not learned a specific ability.

(of a machine or body part) to fail to function or move; to be unable to perform its role

Used to express a sense of blame or reproach for not having done something earlier or better.

(Taiwan colloquial) Used as a polite response to thanks or an apology, similar to "you're welcome" or "no problem".

(Literary) To not meet or see someone.

To be unwilling to perform an action