1、The medication made her feel drowsy and she couldn't shake off the frowziness.
服用药物后，她感到昏昏欲睡，无法摆脱睡意。
2、After a long flight, he was overcome by a frowziness that left him longing for his bed.
长时间的飞行后，他感到一股困乏袭来，渴望着床上休息。