PCS

*rīr-, *rayr- - saliva (SED I No. 234; Kogan 2011: 226)

Hebrew
rīr - spittle, mucus (HALOT 1229)
Jewish Babylonian Aramaic
rīrā - saliva, liquid secretion (DJBA 1078)
Syriac
rīrā - saliva, spittle (LSyr. 727, SL 1462)
Mandaic
rira - spittle, slaver, saliva (MD 434)
Arabic
rayr-, rīr- - saliva of a child (BK 1 961, Lane 1200)