The crossword solution for the term KNOWS HOW is CAN, which is an abbreviation of the verb 'to be able' or 'to have the power or skill to do something'. CAN is a modal verb, which means it is used to express ability, permission, possibility, and obligation. It is also used to ask for permission or to give permission. CAN is one of the most commonly used verbs in English and is used in many different contexts.