IPA: /ˈrɪskiɪst/
KK: /ˈrɪskiɪst/
The most dangerous or likely to cause harm or loss.
Investing in that startup is the riskiest decision I've ever made.
Comparative: riskier
Superlative: riskiest
Riskiest → It is formed from "risk" (from Middle French *risque*, meaning danger or peril) and the suffix "-iest" (meaning most). The word "riskiest" means most full of risk or danger.
Think of the word 'risk' which means danger, and remember that 'riskiest' describes something that has the most danger.