This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

v. Simple past tense and past participle of tenderise.

adj. made tender as by marinating or pounding

"My friends and I love the bikini diets - 4 cashew nuts and the juice from a freshly squeezed pomegranate found on a bank filled with butterflies for breakfast and a slice of tenderised loin meat cut from the shank of a pure bred unicorn for lunch."

tender   

tenderized