Elsewhere means in or to some other place. Look elsewhere, elsewhere in the country, take your business elsewhere.
It works as an adverb and never takes a preposition — you go elsewhere, not to elsewhere. The else in it is an old word meaning other, which survives now only in compounds like elsewhere, otherwise and or else.
1adverbelsewhereIn or to some other place.
“This shop doesn't have my size, so I'll have to look elsewhere.”
elsewhere is a place.
Old English elles hwaer is else, otherwise, plus where.
Old English
elles hwǣr
Middle English
elswher
English, today
elsewhere
Built from
From Middle English elswher, from Old English elles hwǣr and elles hwerġen (“elsewhere”); corresponding with else + where. Cognate with Old High German alleswār (“elsewhere”), whence Middle High German alleswā, alswā (“elsewhere”).
Etymology from Wiktionary, CC BY-SA