A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
P
Q
R
S
T
U
V
W
X
Y
Z
underside (n.)
[underside 词源字典]
1680s, from
under
(adj.) +
side
(n.). Similar formation in Dutch
onderzijde
, Danish
underside
, German
unterseite
.
[underside etymology, underside origin, 英语词源]