1795: bastard Nov 13, 2019

'Bastard' has meant 'illegitimate' child' for a long time, about 800 years, but it's origins are—as many words in this realm are—based in euphemism. Like with 'grass-widow', the word for 'bastard' originated from casual bedding, namely with "fils de bast" or 'packsaddle son', as saddles were often used as bedding while travelling. The '-ard' suffix is a just pejorative one, found in 'coward', 'drunkard', and 'dullard'.
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