chance upon	find or see someone or sth when you did not expect to
come across	meet someone or find sth by chance
cool down	become cooler, or make sth cooler
cut back on	reduce the amount of sth, esp money that you need
die out	become weaker or less common and then disappear completely
dig up	1/3)remove sth from under the ground by digging, 2/3)dig holes in an area of land
dig up	3/3)find information by searching carefully
dry up	when sth ..., all the water comes out of it
get through	1/3)use or finish sth 2/3)manage to deal with a difficult situation or stay alive until it is over
get through	3/3)finish dealing with some work, a subject etc.
heat up	make sth hot
kill off	destroy living things so that most or all of them are dead
put down to	if you ..... to a particular reason, you think it has happened for that reason
slip up	make a cereless mistake
spring up	appear or be produced suddenly and quickly
store up	1/2)keep a lot of sth so that you can use it later 2/2)do sth that will cause problems in the future
throw out	1/3)get rid of sth that you no longer want 2/3)force someone to leave a place or group
throw out	3/3)if someone in authority .... a plan, proposal, etc they refuse to accept it
throw up	1/2)produce sth new or unexpected 2/2)cause sth such at dust or water to rise into the air