burrowed

/B ER1 OW0 D/
verb
  1. 1

    To dig a tunnel or hole

  2. 2

    (with adverbial of direction) to move underneath or press up against in search of safety or comfort

    โ€œThe young girl burrowed into the bed.โ€

  3. 3

    (with into) to investigate thoroughly

    โ€œThe journalist burrowed into the origins of the mayor's corruption.โ€

Source: https://en.wiktionary.org/wiki/burrow, https://en.wiktionary.org/wiki/burrowed