schtum

As a proper noun scutum

is (constellation) a small autumn constellation of the northern sky, said to resemble a shield it lies between the constellations of aquila, sagittarius, and the tail of serpens.

As an adjective schtum is

.

As a verb schtup

is (shtup).

As an adjective schtum is

.

As a noun taxonomy

is the science or the technique used to make a classification.

As an adjective schtum is

.