In some other manner or way; alternatively or differently.
A dialectal or archaic combination of 'else' (meaning 'otherwise') and 'how,' formed during Middle English when such combinations were more common in English, though this particular form is rare.
Old English speakers loved combining simple words to create new meanings—'elsehow' is a relic of a time when English was more flexible with word formation, before standardization locked down how we could build adverbs.
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