बचा हुआ
bacha hua
Leftover means food that is not eaten and is saved for later.
You say 'leftover' like this: left-oh-ver.
The word 'leftover' comes from the words 'left' meaning remaining and 'over' meaning above or beyond.
The word 'leftover' in Hindi is 'बचा हुआ' (Bachā huā).