lets down hair (verb) familiarize: make or become acquainted with, knowledgeable about
Sinonime: bad, beyond recall, cureless, cynical, dejected, demoralized, despairing, desperate, despondent, disconsolate, discouraging, downhearted, fatal, forlorn, gone*, goner, helpless, ill-fated, impossible, impracticable, in despair, incurable, irredeemable, irreparable, irreversible, irrevocable, lost, menacing, no-win, past hope, pointless, sad, shot down, sinister, sunk, threatening, tragic, unachievable, unavailing, unfortunate, unmitigable, up the creek, useless, vain, woebegone, worsening