unseen

US /ʌnˈsin/

UK /ˌʌnˈsi:n/

B1
participleParticipleNot having been seen or able to be seen
The sunrise was unseen by Michael, who was still sleeping

Video subtitles

Arctic Warfare.

08:35Arctic Warfare.

Hudson River helicopter crash kills family of five | BBC News

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This Virus Shouldn't Exist (But it Does)

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Short Film: The Hidden Reason Bees Are Being Wiped Out

18:22Short Film: The Hidden Reason Bees Are Being Wiped Out