The correct answer is (C) To crush extensively. To conquer, overpower, crush, destroy, submerge by irresistible force. To completely overcome in mind or feeling. Also, to load, heap, or treat with an excessive amount.

Overwhelm comes from Old English ofer (over), Middle English whelmen (to turn).

Examples of use:

• She was overwhelmed by their expressions of sympathy.
• They overwhelmed the opposing team with their greater speed.