In a manner that is without bands or strips.
From 'bandless' (without a band) plus the adverbial suffix '-ly,' which converts adjectives to adverbs in English. Both suffixes trace back to Old English roots.
Many English words form adverbs by adding '-ly,' but it's tricky: 'happy' becomes 'happily' (doubling the p), while 'bandless' becomes 'bandlessly' (keeping the full form). These spelling rules developed over centuries of English evolution!
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