On the HSK 2 vocabulary list, at CEFR level A2.

tào ㄊㄠˋ

    • to cover
    • to encase
    • cover
    • sheath
    • to overlap
    • to interleave
    • to model after
    • to copy
    • formula
    • harness
    • loop of rope
    • to fish for

      fig.

    • to obtain slyly
    • classifier for sets, collections
    • bend (of a river or mountain range, in place names)
    • tau (Greek letter Ττ)

Where 套 is used

Sources