IPA: //ˈmoʊldi//
KK: /moʊldi/
Describing something that is covered with mold, which is a type of fungus that grows in damp conditions.
The bread was left out too long and became mouldy.
Comparative: more mouldy
Superlative: most mouldy
Mouldy → It originates from the Old English 'mold' (meaning earth or soil) combined with the suffix '-y' (meaning characterized by). The word 'mouldy' describes something that is characterized by or covered with mold, which often grows in damp earth or soil.
Think of 'mold' as something that grows in damp earth ('mold' from Old English) and remember that 'mouldy' means something that is covered with that growth.