[omarhaneef]

True. I will add that it is customary to justify it by demonstrating it is some sort of acronym or contraction.

[yeetsfromhellL2]

It's a recursive, selective acronym

               C
              CH
             CHI
            CHIN
           CHINC
          CHINCH
         CHINCHI
        CHINCHIL
       CHINCHILL
  ==> CHINCHILLA
      HINCHILLA
      INCHILLA
      NCHILLA
      CHILLA
      HILLA
      ILLA
      LLA
      LA
      A

[omarhaneef]

I know what recursive means, I know what selective means, I know what an acronym is, and I think I see the pattern in that picture, but when I put it all together I am lost.

Alternatively, is this a joke and the "recursive, selective acronym" can be used to justify any word?

[veonik]

               A
              AR
             ARB
            ARBI
           ARBIT
          ARBITR
         ARBITRA
        ARBITRAR
  ==>  ARBITRARY
       RBITRARY
       BITRARY
       ITRARY
       TRARY
       RARY
       ARY
       RY
       Y

Yup, seems it works for any word.