bog down

verb

bogged down; bogging down; bogs down

1

: to cause (something) to sink in wet ground

The mud bogged down the car.

The car got bogged down in the mud.

—often used figuratively

It's easy to get bogged down in details.

2

: to become stuck in wet ground

The car bogged down in the mud.

—often used figuratively

The story bogs down after the second chapter.