Term like air lock, but underwater?

--------------------------------------------------
Rise to the top 3% as a developer or hire one of them at Toptal: https://topt.al/25cXVn
--------------------------------------------------

Music by Eric Matyas
https://www.soundimage.org
Track title: Sunrise at the Stream

--

Chapters
00:00 Term Like Air Lock, But Underwater?
00:35 Accepted Answer Score 100
01:04 Thank you

--

Full question
https://english.stackexchange.com/questi...

--

Content licensed under CC BY-SA
https://meta.stackexchange.com/help/lice...

--

Tags
#singlewordrequests #nonnativeenglish

#avk47