Hallow

Chamber's Twientieth Century Dictionary · 1908 · p. 47

hal′ō, v.t. to make holy: to set apart for religious use: to reverence.— n. a saint.— ns. Hall′owe'en , the evening before All-Hallows or All-Saints' Day; Hall′owmas , the Feast of All-Saints, 1st November. [A.S. hálgian — hálig , holy.]