noun a forceful, often sudden, offensive maneuver; attack.Hundreds of soldiers were killed or wounded in the enemy’s onslaught. See the full entry

to bewilder or to disturb the composure or shake the resolve of; disconcert or daunt.She was determined to go on this dangerous expedition, and the serious objections expressed by her family did…

adjective lacking brilliance or vitality; dull.He’d been a lackluster student, but he shined as an actor.The orchestra gave a lackluster performance on Sunday. See the full entry

noun sentimental remembrance of or longing for people, places, possessions, or experiences of the past.Looking through his old letters and photographs filled him with nostalgia.Nostalgia is what brings many former students back…