v be in motion due to some air or water current
v wander from a direct course or at random
v move about aimlessly or without any destination, often in search of food or employment
v vary or move from a fixed point or course
v live unhurriedly, irresponsibly, or freely
v move in an unhurried fashion
v cause to be carried by a current
v drive slowly and far afield for grazing
v be subject to fluctuation
v be piled up in banks or heaps by the force of wind or a current