IPA: //pəʊˈɛtɪkəl//
KK: /ˈpoʊɪtɪkəl/
Relating to or having the qualities of poetry, often characterized by imagination and beauty.
The poetical language used in her writing painted vivid images in the reader's mind.
Poetical → It is formed from "poet" (from Latin *poeta*, meaning a maker or creator) and the suffix "-ical" (meaning pertaining to or relating to). The word "poetical" refers to something that relates to or is characteristic of a poet or poetry.
Think of a 'poet' as someone who creates beautiful words, and the '-ical' means relating to. So, 'poetical' describes something that relates to the art of poetry.