IPA: //ælˈkɛmɪstɪkəl//
KK: /ælˈkɛmɪstɪkəl/
Relating to the practice of alchemy, which is an ancient form of chemistry focused on transforming materials, often with the goal of turning base metals into gold or finding a universal elixir.
The alchemistical texts were filled with mysterious symbols and ancient knowledge.
Alchemistical → It is formed from "alchemy" (from Arabic *al-kīmiyā*, meaning the art of transformation) and the suffix "-ical" (meaning pertaining to). The word "alchemistical" refers to something that pertains to the art or practice of alchemy, which historically involved the transformation of matter, particularly in the pursuit of turning base metals into gold or finding the elixir of life.
Think of 'alchemy' as the ancient art of transformation, and remember that 'alchemistical' means relating to that transformative practice.