What is the meaning of Bear_down?

Used other than figuratively or idiomatically: see bear, down.

To steer away from the wind; to approach from windward.

To push (someone) to the ground; to defeat, overcome.

To maintain one's position against (someone) in a debate; to stand one's ground against.

To intensify one's efforts.

To approach in a determined manner.

To exert downward pressure on one's abdomen, as in giving birth, forcing out feces, and some similar bodily maneuvers.

Source: wiktionary.org