Answer: stalking

AnswerCrossword Clue
STALKINGTracking down
STALKINGApproaching stealthily
stalkingthe act of stalking
stalkingHarass or persecute (someone) with unwanted and obsessive attention
stalkingMove silently or threateningly through (a place)
stalkingStride somewhere in a proud, stiff, or angry manner
stalkingPursue or approach stealthily