דו

Borrowed from Ancient Greek δύο (dúo), originally in limited Rabbinic Hebrew expressions like דו פרצופין "two-faced".

דּוּ • (du-)

1. Double-, two-, bi-, di-, ambi-, amphi-.

   משמעות (mashma'út, “meaning”) → דו משמעי (du-mashma'í, “ambiguous”)

   חי (khai, “to live, alive”) → דו חי (du-khai, “amphibian”)

   מין (min, “sex”) → דו מיני (du-miní, “bisexual”)

   קומה (kumá, “floor, story”) → דו קומתי (du-kumatí, “two-story, double-decker”)

   צד (tzad, “side”) → דו צדדי (du-tzdadí, “two-sided, bilateral”)

• שתיים (sh'táyim)
• חד (khad-), תְּלַת (t'lát-), רב (rav-)

• Jastrow, Marcus (1903) A Dictionary of the Targumim, the Talmud Babli and Yerushalmi, and the Midrashic Literature‎^[1], London, New York: Luzac & Co., G.P. Putnam's Sons

From Italian do.

דּוֹ • (do) m

1. Do: the first solfège syllable, representing the note C.
   • דו on the Hebrew Wikipedia.Wikipedia ^he

From Middle High German du, from Old High German dū, from Proto-West Germanic *þū, from Proto-Germanic *þū, from Proto-Indo-European *túh₂.

• (YIVO, Northeastern) IPA^(key): /dʊ/
• (Netherlandic) IPA^(key): /duː/
• (Poylish) IPA^(key): /diː/
• (Ukrainish) IPA^(key): /di/

דו • (du)

1. you, thou (second-person singular subject pronoun)