IPA: /ˌpɪə.riˈɒd.ɪ.kəl/
KK: /ˈpɪrɪˌɑdɪkəl/
Relating to something that is published regularly, such as a magazine or journal, often at fixed intervals.
The library subscribes to several periodical publications for research purposes.
A type of publication that is released regularly, such as a magazine or journal, often containing articles, stories, or research.
She subscribes to several periodicals to stay updated on current events and trends.
Periodical → It is formed from "period" (from Greek "periodos", meaning a cycle or a recurring interval) and the suffix "-ical" (meaning pertaining to). The word "periodical" refers to something that occurs at regular intervals or cycles.
Think of a 'cycle' ('period') that happens 'regularly' ('-ical') — that's why periodical means something that happens at regular intervals.