IPA: /njuːˈmɪz.mæt.ɪk/
KK: /nʊˈmɪz.mə.tɪk/
This word describes something that is connected to the study or collection of coins and currency.
He has a numismatic collection that includes rare coins from ancient civilizations.
Numismatic → It is formed from "numisma" (from Greek "νομίσμα", meaning coin or currency) and the suffix "-ic" (meaning pertaining to). The word "numismatic" refers to anything related to the study or collection of coins and currency.
Think of 'numisma' which means coin, and remember that 'numismatic' pertains to the study of coins.