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
unprovoked (adj.)
[unprovoked 词源字典]
1580s, from
un-
(1) "not" + past participle of
provoke
(v.).
[unprovoked etymology, unprovoked origin, 英语词源]