fathoming

verb
  1. 1

    To encircle with outstretched arms, especially to take a measurement; to embrace.

  2. 2

    To measure the depth of, take a sounding of.

  3. 3

    To get to the bottom of; to manage to comprehend; understand (a problem etc.).

    โ€œI can't for the life of me fathom what this means.โ€

Source: https://en.wiktionary.org/wiki/fathom, https://en.wiktionary.org/wiki/fathoming