seachtmhain Definitions (by source) Show all Trí Bior-Ghaoithe an Bháis: The Three Shafts of Death f., week; gen. –e, 3720, 5263 Trí Bior-Ghaoithe an Bháis: The Three Shafts of Death. Author: Geoffrey Keating. Editor: Osborn Bergin.