PWS

*zam- - blood (SED I No. 296)

Arabic
zˀm - presser une plaie de manière que le pus en sorte, le sang se dessèche et forme une croûte (to squeeze a wound so that the pus comes out, the blood dries up and forms a scab) (BK 1 967)
May be related with -ˀ- as a triconsonantizer and a specific semantic development.
Geez
zam - blood (CDG 638)