an interjection, is used (a) in denunciation, Matthew 11:21; 18:7 (twice); eight times in ch. 23; 24:19; 26:24; Mark 13:17; 14:21; Luke 6:24,25 (twice),26; 10:13; six times in ch. 11; Luke 17:1; 21:23; 22:22; 1 Corinthians 9:16; Jude 1:11; Revelation 8:13 (thrice); 12:12; as a noun, Revelation 9:12 (twice); 11:14 (twice); (b) in grief, "alas," Revelation 18:10,16,19 (twice in each).