Expressing eagerness to begin something with energy and without delay.

Enthusiastic Start

Used metaphorically, not about literal diving, but about quickly starting something.

Metaphorical Use

It often carries a positive feeling about the task being started.

It suggests a deep, immersive involvement in the activity, especially in learning or reading.

The phrase can imply concentrating hard on the activity at hand.

Often used when someone is about to do something they love or have great interest in.

Referring to the physical act of jumping headfirst into water.

Most commonly used in the context of swimming or water sports.

It's an action verb in this context, requiring physical movement.