zu'a FAhA2 cmavo

location tense relation/direction; leftwards/to the left of ...

In notes:

x1 is to the left/left-hand side of x2 which faces/in-frame-of-reference x3.
x1 is counterclockwise/left-turn-direction of[/to] x2 along/following track x3 [path] in frame of reference x4 (where the axis is within the region defined by the track as the boundary, as viewed from and defined by view(er) x4; see notes); x1 is locally to the left of x2, according to x4, constrained along x3; x1 is along a left turn from x2 along path x3, as viewed in frame x4.
semi-mathematical binary operator: named number base operator/interpreter