flavourlessUK
blandThe soup is very bland, it could use more herbs and spices.
tastelessThe boiled chicken is practically tasteless.
insipiddisapprovingHe was drinking an insipid light beer.
watered-downThe bar served bad food and watered-down cocktails.
wateryThe coffee was too watery.
like dishwaterinformaldisapprovingThis coffee tastes like dishwater!
weakThe punch was pretty weak.