if something moves through something else then that something will collide with that something else
gathering_things_together is moving_into. digging_hole is moving_earth. another_way_to_say_separates_things is divides_objects. separated_thing is divided_thing. change is when_one_thing_becomes_another_thing. spreading_stuff_onto_surface is spreading. thing is happening. stuck is being_somewhere. moving is going.