potash

/หˆpษ’t.รฆสƒ/
noun
  1. 1

    The water-soluble part of the ash formed by burning plant material; used for making soap and glass and as a fertilizer.

  2. 2

    An impure form of potassium carbonate (K2CO3) mixed with other potassium salts.

  3. 3

    Potassium. Chiefly used in the names of compounds of the form "... of potash".

verb
  1. 1

    To treat with potassium.

Source: https://en.wiktionary.org/wiki/potash