Search:
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
inefficacious (adj.)
"not producing the desired effect," 1650s, from
in-
(1) "not, opposite of" +
efficacious
. Related:
Inefficaciously
;
inefficaciousness
(1640s).
