tsina -sin- gismu

x1 is a stage/platform/dais/[scaffold] at/in x2 supporting x3, made of material x4.

(x3 object/event); See also greku, jubme.

In notes:

greku
x1 is a frame/structure/skeleton/outline supporting/load-bearing/determining the form of x2.
jubme
x1 is a table/flat solid upper surface of material x2, supported by legs/base/pedestal x3.
dracydi'u
di1 is a theater for performing plays with theme di2=dr2 for audience x3=dr4 with actors x4=dr5.
si'astu
st1 is a place of honor/[shrine/podium/wall area/trophy case] for person/thing/[event] st2=si2 venerated/honored by si1