flavorless
/ˈflævərˌlɛs/Definitions
1. adjective
lacking or having no flavor
“The flavorless soup was a disappointment to the chef.”
2. noun
a person or thing that is lacking or has no flavor
“The flavorless dishes at the restaurant were a letdown to the food critics.”
3. adverb
in a way that lacks or has no flavor
“She cooked the meat flavorlessly, which made it tasteless.”