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