galtu -gal-ga'u- gismu

x1 is high/up/upward in frame of reference x2 as compared with baseline/standard height x3.

Also upper; x3 is generally some defined distance above a zero point/baseline, or is that baseline itself. See also gapru, dizlo, cnita, drudi, farna.

In notes:

cnita
x1 is directly/vertically beneath/below/under/underneath/down from x2 in frame of reference x3.
dizlo
x1 is low/down/downward in frame of reference x2 as compared with baseline/standard height x3.
drudi
x1 is a roof/top/ceiling/lid of x2.
farna
x1 is the direction of x2 (object/event) from origin/in frame of reference x3.
gapru
x1 is directly/vertically above/upwards-from x2 in gravity/frame of reference x3.
galmu'u
m1 rises to m2=g1 from origin m3=g3 via path m4.
galraipau
p1=g1=t1 is the top (uppermost part) of p2.
galtupcra
c1=g1 is the lap of t2.
sezgalgau
gas1=s1 raises/elevates it/his/her self by in frame of reference gal2 as compared with standard/baseline gal3.