IPA: /ˈʌltrəˌrɛə/
KK: /ˈʌltrəˌrɛr/
Something that is extremely rare and hard to find.
The collector was thrilled to discover an ultrarare coin at the auction.
Ultrarare is formed from "ultra-" (meaning beyond or extreme) and "rare" (from Latin "rarus", meaning uncommon or infrequent). The word "ultrarare" describes something that is extremely uncommon or exceedingly rare.
Think of 'ultra-' meaning beyond or extreme, and 'rare' meaning uncommon. This helps you remember that 'ultrarare' refers to something that is exceedingly uncommon.
No commonly confused words.