“shofar.” The ram’s horn trumpet, not the metal trumpet.
“lost.” The Hebrew word is 'abad (#0006 אָבַד) and it has a wide enough meaning to include both those who are already dead and those who were perishing. Thus it implies both a resurrection of the dead and a gathering of the living (cp. Matt. 25:31-46, the Sheep and Goat Judgment; see commentary on Matt. 25:32).