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

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adj. Without bones, especially as pertaining to meat or poultry prepared for eating.

adj. Lacking strength, courage, or resolve; spineless.

adj. Without bones.

Without bones; wanting bones: as, “his boneless gums,”

adj. being without a bone or bones

"To writhe his body about in boneless contortions for her amusement — “I dance for ladies” — and break off his exhibition in a fit of giggles."

deboned    boned   

nerveless    rubbery    sinewy    limp    flaccid    limber    pliant    leathery    headless    stringy