IPA: /ˈhɑːrdiəst/
KK: /ˈhɑrdɪəst/
The strongest or most able to survive difficult conditions.
The hardiest plants can thrive in extreme weather.
Comparative: hardier
Superlative: hardiest
Hardiest → It is formed from "hardy" (from Old French *hardi*, meaning bold or brave) and the suffix "-est" (meaning the most). The word "hardiest" refers to the most bold or resilient among a group.
Think of someone who is the 'most bold' or 'most resilient' — 'hardy' means bold, and '-est' indicates the highest degree.