1) Exclusively Anglo word 2) Exclusively Saxon word 3) Fruitless 4) Futile 5) Like a barefoot cowboy 6) Sleeveless 7) Unavailing 8) Unproductive 9) Unproductive of success 10) Useless 11) Vain 12) Word with Anglo-Saxon origins 13) Word of purely Anglo origin Found on https://www.crosswordclues.com/clue/bootless
Boot'less adjective [ From Boot profit.] Unavailing; unprofitable; useless; without advantage or success. Chaucer. « I'll follow him no more with bootless prayers. Shak. » -- Boot'less*ly , adverb -- Boot'less*ness ,... Found on http://www.encyclo.co.uk/webster/B/80
fruitlessadjective unproductive of success; `a fruitless search`; `futile years after her artistic peak`; `a sleeveless errand`; `a vain attempt` Found on https://www.encyclo.co.uk/local/20974