Extended root stu - (stau -), becoming stau - before consonants, stw - before vowels; basic meaning stout-standing, strong. 1. Suffixed extended form stw - -. stow, from Old English stw, place, from Germanic stw. 2. Probable o-grade suffixed extended form stw-y -. stoa, stoic, from Greek sto (also stoi, sti), porch. 3. Suffixed extended form stau-ro -. a. (i) store; instauration, from Latin nstaurre, to restore, set upright again (in -, on; see en); (ii) restore, from Latin restaurre, to restore, rebuild (re -, anew, again; see re -); b. staurolite, from Greek stauros, cross, post, stake. 4. Variant tau-ro -, bull (see tauro -)