What is the meaning of Dah?

The spoken representation of a dash in radio and telegraph Morse code.

A long knife or sword with a round cross-section grip, a long, gently curving blade with a single edge, and no guard.

good, okay

perfective aspect

bye, good bye

service, duty

Clipping of sudah.

Marks the perfective aspect.

up, off, at an elevation, set off

Alternative form of dāg

they

bell

Alternative spelling of

breath

breathing, respiration

stench, odor

river

Source: wiktionary.org