Without gaiters; not wearing or having gaiters as protection or covering.
From the noun 'gaiter' plus the suffix '-less,' which means without or lacking. This is a productive English suffix that can attach to almost any noun to create an adjective meaning the absence of that thing.
The suffix '-less' is one of English's most powerful word-building tools—you can add it to almost any noun to make a new adjective, which is why we can describe someone as 'gaiterless' even if it's not a common word.
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