early 13c., from un- (1) "not" + seen. Similar formation in Old English ungesewen, Middle Dutch ongesien, Dutch ongezien, Old High German ungesëhan, German ungesehen, Old Norse usenn.
unseen problems
unseen natural resources
unseen forces at work
unseat
unsecure
unsecured
unseeded
unseemly
unseen
unselfish
unsentimental
unseparable
unsettle
unsettled
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