דּוּ I, (= רְּהוּ, cmp. דִּי) who, which is, since he, it, &c. Y. Sabb. XIX, beg. 16ᵈ דו אמר … הוא דאמר the same that says …, says also &c. Y. Peah I, 15ᶜ top בגין דו בעי וכ׳ because he wants to teach &c. Y. Maasr. I, 49ᵃ bot. מן דו from the time that. Y. Gitt. IX, 50ᶜ top nobody says ‘even’ אלא דו מודה וכ׳ except he admits the preceding; a. fr.