From Akkadian šutappu from Sumerian ŠU.TAB, "partner". The JLA passage at TgJ Is59:3 "hands associated with blood" is almost certainly an error in the "scholarly" texts for a form of שטף, i.e. "drenched in blood". Page refs. in other dictionaries: DJPA: 543a; DJBA: 1126b; Jastrow: 1544; Levy Ch-W: 2:523; Tal Sam: 936b;
The JLA passage at TgJ Is59:3 "hands associated with blood" is almost certainly an error in the "scholarly" texts for a form of שטף, i.e. "drenched in blood".
šwtp vb. to make a partner šwtpw, šwtpwtˀ (šaw/ūtāp̄ū, šaw/ūtāp̄ūṯā) n.f. partnership štp vb. D to make an ally