What is the origin of 'sleep tight'?
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Synonyms of profitless in English:
profitless
See definition of profitless
adjective
1‘further argument would be profitless’
SYNONYMS
pointless, useless, to no purpose, no use, of no use, unprofitable, futile, vain, in vain, to no avail, to no effect, fruitless, senseless, unproductive, purposeless, idle, worthless, valueless, ineffective, unavailing, unrewarding, thankless
archaic bootless
