burrow

Rats live in drains, sewers and burrows, and emerge mostly at night, so counting them is nearly impossible and estimates on rat population figures vary.

Ella is fiercely committed to her job, burrowing into the minutiae of legislation to become deeply connected to it emotionally.

England finished the half, turning down a kick at goal and seeming to turn out the lights on the contest when Cowan-Dickie burrowed over from the subsequent driven line-out.

According to him, he had indeed burrowed into a trove of data from a large materials-science company, as his paper said he did.

And, in the San Francisco Bay Area, burrowing rodents may be digging into entombed trash at a landfill-turned-park, unloosing explosive levels of methane.