ܛܰܣܽܘܓܳܐ ṭswgʾ ṭasuḡā, ṭassuḡā a measure of weight
ManMP tswq /tasūg/ a small coin (or weight), a quarter (Durkin-Meisterernst 2004, 326; Henning 1940, 25); NP tasū a weight of four (according to others of two) barley-corns; the twenty-fourth part of a weight, measure, or day (Steingass 301); Arm. LW thasu a coin (late loanword from NP, cf. Hübschmann AG 266, no. 49). — Arab. LW ṭassūǧ id., but also "a square, settlement, a village, a tract of land" (Nyberg 192). Nyberg 192 observes that the real meaning of Syr. ṭswgʾ is “the fourth part of a dānqā (itself the fourth part of a dirham)”; as regards the semantics, see also s.v. dnqʾ ● Duv B 2, 69, 14 (s.l.); ON 149, 19 ◆ LS 281b; PS Comp. 177; PS Suppl. 146; Duval index pers. 222
ManMP tasūg is related to MP tasum [tswm] fourth (CPD 82); ManMP tswm /tasom/ id. (Durkin-Meisterernst 2004, 326); MP tasum, tasom < *casom, with dissimilation of c-, < OP *čaçama-, OIr. *čaθrama- (Nyberg 192).