On gloss:

tarla
x1 is a quantity of/contains/is made of tar/asphalt from source x2.
tarlypu'i in sense "to put tar on"
p1 tars or puts tar p2=t1 on p3.

On affix form:

tarci
x1 is a star/sun with stellar properties x2.

In definition:

sostartai
x1 = tai1 is a constellation of stars x2 = tar1 (set, quantity, region), according to standard x3.
tarlyla'u
l1 is an asphalt lake / a tar lake.