DIVING

To swim under water.

To jump into water head-first.

To jump headfirst toward the ground or into another substance.

Example: "To dive into home plate"

To descend sharply or steeply.

(especially with in) to undertake with enthusiasm.

Example: "She dove right in and started making improvements."

To deliberately fall down after a challenge, imitating being fouled, in the hope of getting one's opponent penalised.

To cause to descend, dunk; to plunge something into water.

To explore by diving; to plunge into.

To plunge or to go deeply into any subject, question, business, etc.; to penetrate; to explore.