| Idioms – K
Keep in touch - To keep “communicating’ (writing, calling, etc.), usually after someone moves far away
Keep your chin up - To keep confidence and not be sad or ashamed about something.
Keep your fingers crossed Cross your fingers - We say this when we hope or wish for something to happen. (We cross our fingers when we hope or wish for a positive result – in a baseball game, in the lottery, or on a test, for example.) Keep your shirt on - This means “calm down” or “don’t get so excited.” Kill two birds with one stone - If you “kill two birds with one stone,” this means that you accomplish two tasks at the same time. (For example, if you go to a mall or department store, you can 1) get a haircut, and 2) buy some groceries.) Knock ‘em dead - This is a funny way to say “Good luck” (similar to “Break a leg”). Knock on wood - We “knock on wood” to hope for good luck or to hope for continued safety. (For example, if someone says, “I’ve never broken a bone before,” he might then add, “Knock on wood,” which means that he hopes to continue this pattern of good luck.) | 
