IPA: //ˈnʌlə//
KK: /nʌlɑː/
A small valley or gully, often found in southern Asia, that can carry water during heavy rain.
The heavy rains caused the nullah to overflow, flooding the nearby fields.
The word 'nullah' originates from Hindi 'nala', meaning a stream or a watercourse. It refers specifically to a seasonal stream or a dry riverbed that may fill with water during the rainy season.
Think of 'nala' in Hindi, which means a stream, to remember that 'nullah' refers to a watercourse or stream.