Before revision: In terms of linguistic history, this verb is related to forms such as the English “be”, German sein or Latin fui (Lohmann 1960: 174; Pfeifer 1993: 1273; Beekes 2010: 1598).
After revision: In terms of linguistic history, this verb is related to forms such as the English “be”, German sein or Latin esse (Lohmann 1960: 174; Pfeifer 1993: 1273; Beekes 2010: 1598).