suss russian

• раскуси́ть

  to bite through, to bite in two, to crack (with the teeth)

  to see through (someone), to figure (someone) out, to suss (someone) out

  to figure out, to get to the bottom of, to crack

• просе́чь

  to catch on, to get it, to twig, to suss out

  to cut through, to hack through, to cut a deep notch in