Phrasal Verb: Start up

Meaning: Open a business

Example: The firm STARTED UP on a shoestring budget.

Meaning: Begin, especially sounds

Example: There was a pause, then the noise STARTED UP again.

Meaning: When an engine starts working

Example: The car STARTED UP first time.

Meaning: Make an engine work

Example: I STARTED the car UP.

Meaning: Sit or stand upright because someone has surprised you

Example: He STARTED UP when I entered the room and tried to hide what he was doing.