dys
bad, disordered, difficult
es, eis
inward, into
ec (ex before vowels/ h)
out, out of, outside
en (em, el)
in, into, inward
en +anti
opposite
endo, ento (end, end before vowels/ h)
within, inner
epi (ep before vowels/ h)
upon, on, to, in addition to
eu
well, good, normal
exo, ecto
outside, external