flank
flaŋk
noun
the side of a person’s or animal’s body between the ribs and the hip.
leaning against his horse’s flanks
side,haunch,loin,quarter,thigh
verb
be on each or on one side of.
the three defendants stood in the dock, flanked by police officers
edge,bound,line,border,fringe,skirt,be situated along,surround,circle,ring,circumscribe