IPA: /ˈmoʊldɪst/
KK: /moʊldɪst/
Having the most mold; very old or decayed, often with a musty smell.
The bread in the back of the cupboard was the moldiest I've ever seen.
Comparative: moldier
Superlative: moldiest
Moldiest → It is formed from "mold" (from Old English *mold*, meaning earth or soil) and the suffix "-iest" (meaning most). The word "moldiest" refers to something that has the most mold, often implying it is the most decayed or spoiled.
Think of 'mold' as something that grows in 'earth' or 'soil' and remember that 'moldiest' means the most affected by mold.