acrid → active
acrid (a smell or taste that is strong and unpleasant): The room was filled with the acrid smell of tobacco.
acrimonious (angry or harsh): Their marriage ended in an acrimonious divorce.
across (from one side to the other): It was so narrow that I could swim across.
across (on the opposite side): A big supermarket is just across the road.
activate (make something start working): Cooking fumes will activate the alarm.
active (involved in a particular activity): They are active in the antiwar movement.
active (always busy doing things) He is over 80, but is still very active.
active (operative, working): This water mill was active until late1970s.
Protection