quam-dĭu, less freq. quandĭu (mostly as two words, sometimes separated: quam voluit diu, Cic. Q. Fr. 1, 1, 7), adv.
I Interrog. , how long ago? how long? quamdiu id factum est? Plaut. Capt. 5, 3, 3: quandiu apud vos ero, Vulg. Marc. 9, 18.—
II Rel.
1 Of time, as long as , until , during (class.): quamdiu potuit, tacuit, Caes. B. G. 1, 17: disces, quamdiu voles, Cic. Off. 1, 1, 2; Col. 12, 52, 13.—
β Until (very rare): jubebat, ut semper id comesset, quamdiu tamen melius invenisset, Lampr. Elag. 29, 7.— Comp. : quamdiutius, Not. Tir. p. 35.— Sup. : ‡ quamdiutissime, Not. Tir. p. 35.—
2 Of inference, inasmuch as , in that (late Lat.): quandiu fecistis uni ex his fratribus, Vulg. Matt. 25, 40.