to scout for a tour operator

provoking by entering enemy's turf or area of control (spoken)

to step on the boundary line; to step into someone else's territory

bicycle riding; cycling

to harass someone; to invade someone's territory [colloquial]

to tread water

to ride a bike

to operate by means of a pedal

stage rehearsal

to keep going without rest or sleeping

to step on the accelerator; to accelerate a motor vehicle

to check out the route in advance to gather information

to step on a mine

to slander each other

to step on ice; to go ice skating

stepping over the boundary; taking things too far (spoken)

to stumble; to lose one's footing

to lose balance after stepping on the ball (football jargon)

to do dangerous things; to walk a tighwire

walking slowly (slang)

to step into one's sphere of influence and to be of a threat to their benefits (or conflicts with their interests)

to reconnoiter; to case the joint

to dislike; to downvote (on social media)

to scout