If typical, this word would mean that the direction of x3 from x4 or in
frame of reference x4 is made to be x2 by agent x1. This is quite a bit
wider in meaning than the typical meaning of "aim". Moreover, there is not
really room for this word to accept a concrete object as a sumti except by
x4; to aim a gun would therefore have, at best, x4 filled by "gun". But
that does not mean necessarily that the barrel direction is toward x3, just
that x2 is the direction from an origin located at the gun to x3. Moreover,
if the gun is not moved (in a certain frame of reference) but the target is
positioned in front of it, this would still count as aiming the gun in this
sense.