PS

*šumšum- - ant (SED II No. 205)

Cf. Tgr. šašənte ‘ants’ (WTS 214), probably related with the first m lost and the second one assimilated to n before t (for an alternative interpretation of this form v. *sā/ūs- ‘moth’, SED II No. 198). Cf. Sod. mašo ‘kind of ant’ (EDG 433). Metathesis of a non-reduplicated prototype of the present root?

Jewish Babylonian Aramaic
šumšmānā, šuššmānā - ant (DJBA 1121)
Syriac
šawšmānā - sesame (LSyr. 767, SL 1538)
Mandaic
šušmana - ant (MD 458)
Turoyo
šəšwono - Ameise (ant) (RW 483)
Arabic
sumsum- - red ant (BK 1 1138, Lane 1420, LA XII 305)
In Lane and LA also simsimat- and sam(m)āmat-. Cf. Nöldeke 1904 118 (”Das arabische, nicht wirklich belegte und jedenfalls sehr seltene, Wort ist wohl dem Aramäischen entlehnt”).