Without breeches; not wearing knee-length pants.
From 'breeches' (pants) plus the suffix '-less' (without), from Old English origins. The suffix '-less' comes from Germanic roots meaning 'free from' or 'lacking.'
The '-less' suffix is incredibly productive in English—you can slap it on almost any noun and instantly create an adjective, which is why people invented silly words like 'breechesless' to describe pantsless situations.
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