-und = in flow with water
abound
ab- = off, away from + o + und = rise in a wave
aboundance
aboundantly
inundate
in + und + ate
shingle
shin = thin
us-, ut- = use, 使用
use
used
user
useful
useless
useable
land-use
unused
usefulness
reusable
usual
usually
unusual
unusually
abuse
abusive
abuser
usurp
utensil
utilize
utility
utilization
brook
uni- = one, unique
unify
vt.
unifying
adj.
unified
adj.
unification
n.
reunification
n.
unilateral
adj.
unilaterally
adv.
union
n.
reunion
n.
unionized
adj.
unique
adj.
uniquely
adv.
uniqueness
n.
unit
n.
unite
v.vt
united
adj.
unitary
adj.
reunite
vt.
unity
n.
unanimous
adj. un=uni + anim=mind,spirit + ous
unicorn
n.