1. delineate
to outline
de (down) +
lin(line)

2. emollient
softener
ex (out)+
moll (soft)

3. retrograde
Moving backwards; reverting
retro (backward) +
grade (step)

4. melancholy
extreme sadness
mela (black) +
Chol (bile)

5. intracranial
within the skull
intra (within) +
cran (skull)

6. cardiovascular
of heart and vessels
cardio (heart) +
vas (vessel)

7. epiphany
A-ha! moment
epi (on) +
phan (appearance)

8. histology
study of living tissue
hist (tissue) +
logy (science)

9. perihelion
Orbital point around sun
peri (around) +
helio (sun)

10. inherent
built-in
in (into) +
here (stick)

11. plutocracy pluto (wealth) + cracy (government)
government of the wealthy
pluto (wealth) +
cracy (government)

12. sine qua non
without which not
sine (without) +
non (not)

13. corpulent
fat
corp (body)

14. dichotomy
two-part division
dicho (two parts) +
tomy (cut)

15. pathological
diseased
patho (disease) +
logy (science)

16. cryptic
having hidden meaning
crypt (hidden)

17. isosceles
having two equal sides
iso (equal) +
scel (legs)

18. pathogen disease-causer patho (disease) +
gen (origin, one that produces)

19. vociferous
loud
voc (voice) +
fer (carry) +
ous (full of)

20. rectify
correct
rect (right) +
fy (make)

21. sanctimonious
hypocritically religious
sanct (holy) +
Mony (condition)

22. tortuous
twisting
tort (twist) +
ous (full of)

23. rectilinear
Right-angled
rect (right) +
lin (line)

24. metamorphosis
change of shape
meta (change) +
morph (shape)

25. petroglyph
rock carving
petr (rock) +
glyph (carving)