quword
趣词
Word Origins Dictionary
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
obligatory (adj.)
[obligatory 词源字典]
c. 1400, from Old French
obligatoire
"creating an obligation, obligatory," and directly from Late Latin
obligatorius
"binding," from
obligat-
, past participle stem of
obligare
(see
oblige
).
[obligatory etymology, obligatory origin, 英语词源]