diadi noun English. Female of either of two Philippine monitor lizards. Example sentence: Subanen. Kali'u pegbembin mikelaamu gibid diadi ma'ananen ki diadi bekalan di gibid. English. When I was snaring, I caught a diadi sailfin water lizard, meaning the diadi is the female of a sailfin water lizard. c.f. ibid; lekpaw; lesagan Generic. tubu'