At some time; indefinitely; some time or other, sometime(adverb)
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Use "somewhen" in a sentence
"My German friend made up the word "somewhen" last night when trying to think of the word "sometime"."
"It may simply be my lack of understanding of relativity and of quantum physics although Richard Feynmann suggested that no one understands it, which makes me feel somewhat better, but I remain to be persuaded that the past continues to exist 'somewhen'."
"We went somewhere ... somewhen, that is, for we are still here now .... ""