Search:
Search Mode
Natural Language
Find single term
Find any term
Find exact phrase
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
proficiency
1540s, probably from L.
proficientem
(nom.
proficiens
), prp. of
proficere
"accomplish, make progress, be useful," from
pro-
"forward" + root of
facere
"to make" (see
factitious
).
