on
off
out
up
surprise
100

eat small amounts of something as a snack

SNACK ON 

100

remove something by cutting it, stop having a close relationship with someone

CUT OFF

100

give things to different people in a group

HAND OUT

100

to make something full, or to become full

FILL UP

100

stop trying

GIVE UP

200

continue an activity or task

CARRY ON, GO ON

200

start a journey 

SET OFF

200

put some drink into a glass or cup from another container

POUR OUT

200

increase

GO UP

200

get a large quantity of something for later use, hoard

STOCK UP ON 

300

wear, produce (a performance), operate 

PUT ON

300

separate something from its main part

BREAK OFF

300

do and complete

CARRY OUT

300
eat quickly

GOBBLE UP

300

spend less, do less, or use less of something

CUT BACK ON

400

continue doing something that is difficult or tiring

STRUGGLE ON

400
leave somewhere, usually without telling anyone that you're going 

TAKE OFF

400

become available 

BRING/COME OUT

400

finally be in a particular place or situation

END UP

400

eat as fast as possible

WOLF DOWN

500

accept responsibility/some work

TAKE ON

500

emit

GIVE OFF

500
trouble/annoy/inconvenience someone

PUT OUT

500

introduce a new point

BRING UP

500

eat only small amounts of a meal because you don't feel hungry/don't like the food

PICK AT