Explanation:: A buttress supporting a wall or other structure by an arch or part of an  arch that transmits the thrust outwards and downwards.
 # Remaining Guess: 2
   # Remaining Guess: 2
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 Choose A Letter:
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