IPA: /ˈpraɪslɪsli/
KK: /ˈpraɪslɪsli/
In a way that is so valuable that it cannot be measured in terms of money.
The memories of our time together are pricelessly cherished in my heart.
Pricelessly → It is formed from "priceless" (from "price" (from Old French *pris*, meaning value or worth) and the suffix "-less" (meaning without)) and the adverbial suffix "-ly" (meaning in a manner). The word "pricelessly" means in a manner that is without price or value, indicating something of immeasurable worth.
Think of something that is 'without price' ('-less') and how it is valued 'in a manner' ('-ly'). This helps you remember that 'pricelessly' describes something that cannot be measured by money.