IPA: //tsuˈnæmɪk//
KK: /tsuˈnæmɪk/
Relating to a large ocean wave caused by an underwater earthquake or volcanic eruption.
The tsunamic waves caused significant damage to the coastal town.
Tsunamic is derived from the word 'tsunami' (from Japanese '津波', meaning harbor wave) combined with the suffix '-ic' (meaning pertaining to). The term 'tsunamic' refers to something that is related to or characteristic of a tsunami.
Think of 'tsunami' as a powerful wave and remember that 'tsunamic' means something related to that powerful wave.
No commonly confused words.