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burrowing

noun

a hole or tunnel in the ground made by a rabbit, fox, or similar animal for habitation and refuge.
a place of retreat; shelter or refuge.

verb (used without object)

to make a hole or passage in, into, or under something.
to lodge in a burrow.
to hide.
to proceed by or as if by digging.

verb (used with object)

to put a burrow into (a hill, mountainside, etc.).
to hide (oneself), as in a burrow.
to make by or as if by burrowing: We burrowed our way through the crowd.

noun

a hole or tunnel dug in the ground by a rabbit, fox, or other small animal, for habitation or shelter
a small snug place affording shelter or retreat

verb

to dig (a burrow) in, through, or under (ground)
(intr often foll by through) to move through by or as by diggingto burrow through the forest
(intr) to hide or live in a burrow
(intr) to delve deeplyhe burrowed into his pockets
to hide (oneself)

“rabbit-hole, fox-hole, etc.,” c.1300, borewe, from Old English burgh “stronghold, fortress” (see borough); influenced by bergh “hill,” and berwen “to defend, take refuge.”

c.1600, “to place in a burrow, from burrow (n.). Figuratively (e.g. to burrow (one’s) head) by 1862. Intransitive sense, “to bore one’s way into, penetrate” is from 1610s, originally figurative (literal sense, of animals, attested by 1771). Related: Burrowed; borrowing.