pron- thru tens-
prons-
bent forward
proto-
first
psycho-
mind
pyro-
fire
quad- or quadr-
four-sided
re-
back; again
rect-
straight
retro-
backward; behind
rhin- or rhino-
nose
ruga-
fold; wrinkle
sapro- or septi-
rotten
sclero-
hard
sens-
feeling
serrat-
saw
sin- or sino-
a hollow
somnus-
sleep
sphin-
squeeze
squam-
scale; flat
steno-
narrow
strat-
layer
sucr-
sweet
sym- or syn-
together; with
tachy-
rapid
tact-
touch
tens-
stretched