o·ver·whelm (ō'vər-hwělm', -wělm')
tr.v. o·ver·whelmed, o·ver·whelm·ing, o·ver·whelms

To surge over and submerge; engulf: waves overwhelming the rocky shoreline.
To defeat completely and decisively: Our team overwhelmed the visitors by 40 points.
To affect deeply in mind or emotion: Despair overwhelmed me.
To present with an excessive amount: They overwhelmed us with expensive gifts.
To turn over; upset: The small craft was overwhelmed by the enormous waves.