sanli -sa'i- gismu

x1 stands [is vertically oriented] on surface x2 supported by limbs/support/pedestal x3.

x1 is standing; x1 stands up; x1 is erect/vertical/upright; x1 bows/bends over (= krosa'i, krosa'ibi'o, plosa'i); frame of reference is (approximate) perpendicularity to the surface, and not to a gravity field. See also kamju, sraji, tuple, zbepi, sarji.

In notes:

kamju
x1 is a column/pillar of material x2.
sarji
x1 supports/holds up/is underpinning of/[helps] x2 against force/opposition x3 with/by means x4.
sraji
x1 is vertical/upright/erect/plumb/oriented straight up and down in reference frame/gravity x2.
tuple
x1 is a/the leg [body-part] of x2; [metaphor: supporting branch].
zbepi
x1 is a pedestal/base/stand/pallet supporting x2 (object/event), of materials/properties x3.
krosa'i
s1=k1 bows/takes a bow on surface s2 supported by limbs/supports s3.
sa'irbi'o
b1=s1 stands up/arises onto surface s2 supported by limbs s3.