re-
in-
pro-
pre-
Surprise!
100

re-vise

revise

100

in-vest

invest

100

pro-tect

protect

100

pre-mix

premix

100

pro-fess

profess

200

re-flect

reflect

200

in-dependent

independent
200

pro-gram

program

200

pre-test

pretest

200

pro-cure

procure

300

re-fresh

refresh

300

in-struct

instruct

300

pro-pose

propose

300

pre-made

premade

300

pre-sent

present

400

re-sume

resume

400

in-stall

install

400

pro-mote

promote

400

pre-fix

prefix

400

pro-long

prolong

500

re-act

react

500

in-ability

inability

500

pro-hibit

prohibit

500

pre-vent

prevent

500

pro-tract

protract