Knock together

to make something quickly, or without putting too much thought into details

Knock up (1) INFORMAL

to make something quickly and without too much effort

knock up (2)

to make a woman pregnant

Know of

If you know of something, you are aware of it.

Known as

to be called a certain name, even though it mightn't be a real or official name

Known for

to be well-known for something or famous for something

Knuckle down INFORMAL

If you knuckle down, you start to take your work or your task seriously and do it properly.

Lash out

to verbally or physically attack someone or something

Laugh off

to joke about something in order to make it seem less serious

Launch into

to start off something, like a speech or a song, in an energetic way

Lay aside

to keep something for the future, such as money

Lay down

to officially state something like a policy, or rules, regulations, conditions, guidelines, etc.

Lay into (1) INFORMAL

to attack someone and repeatedly punch and kick them