Dive

1. To plunge into water head foremost; to thrust the body under, or deeply into, water or other fluid.
2. A plunge headforemost into water, the act of one who dives, literally or figuratively.
3. A place of low resort.
4. Fig.: To plunge or to go deeply into any subject, question, business, etc.; to penetrate; to explore.
5. To plunge (a person or thing) into water; to dip; to duck.
6. To explore by diving; to plunge into.