From Ottoman Turkish اوینتی (oyuntu, “an excavation, the material scooped out”), from Ottoman Turkish اویمق (oymaḳ, “to excavate, to scoop out, to carve, to engrave”), from Proto-Turkic *oy- (“to dig, to pick”), morphologically oy- + -un + -tu.
Practice speaking and memorizing "oyuntu" and many other words and sentences in Turkish.