1. re(d)- back
UND- wave
(adj.)
coming back in waves, superfluous

2. pro- forward
TRUS- push
(adj.)
sticking out

3. re- back
GRESS- step
(noun)
return

4. retro- backward
SPECT- look
(adj.)
looking back on the past

5. VID- see
(adj.?)
pertaining to seeing

6. con- together
PEND- hang
(noun)
collection, summary

7. pre- before
CLUD- shut (out)
(verb)
to prevent by necessity, to make impossible

8. retro- backwards
GRAD- step
(adj.)
retreating

9. in- in
PLE- fill
(verb)
to put into effect

10. se- away
CLUS- shut
(noun)
state of being shut away from others

11. in- not
SUPER- overcome
(adj.)
unable to be conquered

12. pro- forth
PEND- hang
(noun)
natural inclination

13. con- together
SPECT- look
(noun)
overview

14. trans- across
GRESS- step
(noun)
violations

15. pre- before
SENT- feel
(noun)
a sense that some thing is about to happen

16. sub- under
CUR- run
(noun)
help, support

17. con- together
CUR- run
(verb)
to agree

18. sub- under
VERT- turn
(verb)
to undermine

19. in- not
re- back
VOC- call
(adj.)
incapable of being changed

20. sub- under
PLE- fill
(adj.)
additional

1. CENT- 100
PED- feet
(noun)
a multi-legged insect

2. VI- way
DUCT- lead
(noun)
a long bridge

3. DU- two
(noun)
the condition of being in two parts at once

4. QUADR- four
PART- part
(adj.)
having four parts

5. SEXT- six
-uple fold
(noun)
six at once

6. inter- between
LOCU- speak
(noun)
a partner in conversation

7. con- together
VOC- call
(noun)
assembly

8. trans- across
VERS- turn
(adj.)
crosswise, cutting from side to side

9. SACRo- holy
SANCT- holy
(adj.)
very holy

10. ad- to
CED- yield
(verb)
to agree to

11. TRI- three
PART- part
(adj.)
being in three parts

12. in- into
CURS- run
(noun)
sudden attacks

13. CENT- 100
GRAD- step
(adj.)
on a scale of 100

14. de- negative
SECR- holy
(noun)
violation of something holy

15. SEMI- half
FIN- end
(noun)
the next-to-last round

16. DECIM- tenth
(verb)
to reduce drastically

17. ex- out, completely
LUS- play, trick
(adj.)
hard to hold on to

18. PENS- hang
(adj.)
deep in thought

19. QUADRU- four
PED- foot
(noun)
four-footed animals

20. (a) PRIM- first
(noun)
the first order of animals

(b) PRIM- first
(noun)
first among bishops