beside

paradox (noun): something seemingly true and opposite at the same time

para + dox

per-

through

persecute (verb): to go after, to pursue

per + secute

post-

after

postpone (verb): to put off to a later time, to delay

post + pone

pre-

before

precede (verb): to go before, to come in front of

pre + cede

pro- 

for, forward

propel (verb): to push forward

pro + pel

re-

back, again

readmit (verb): to allow in again

re + ad + mit

retro-

backward

retrospect (noun) to look back at past events

retro + spect

apart, move away from

secede (verb): to withdraw from an organization

se + cede

semi-

half

semiannual (adjective): occurring twice a year

semi + annu + al

sub-, suc-, suf-, sup-, sur-, sus

under, beneath, near, from below, secretly, above, up

submarine (adjective): underwater

sub + mar + ine

super- 

over, above

superimpose (verb): to place something on top of something else

super + im + pose

syn-, sym- 

together, at the same time

sympathy (noun): sharing another person's feelings, compassion

sym + path + y

trans-

across, beyond, change

transform (verb): to change shape

trans + form

tri-

three

tripod (noun): a three-legged stand

tri + pod

not, against, opposite

unceasing (adjective): never ending, continuous

un + ceas + ing

uni-

one

uniform (adjective): having the same form or consistency

uni + form