Aback - Definition
aback
adv 1: having the wind against the forward side of the sails;
"the ship came up into the wind with all yards aback"
2: by surprise; "taken aback by the caustic remarks"
adv 1: having the wind against the forward side of the sails;
"the ship came up into the wind with all yards aback"
2: by surprise; "taken aback by the caustic remarks"