on no account must

on no account must/should somebody do something

(formal)

if you tell someone that on no account must they do something, you mean that they must never, for any reason do that thing On no account must the contents of this document be shown to any other person.

Common Names:

Name	Pronounced	Usage
Celio	CHE-lyo (Italian), THE-lyo (Spanish), SE-lyo (Latin American Spanish), SE-lyoo (Portuguese)	Italian, Spanish, Portuguese
Uranus	yuw-RAY-nəs (English), YUWR-ən-əs (English)	Greek Mythology (Latinized)
Ayako	ah-yah-ko	Japanese
Mal'akhi	-	Biblical Hebrew
Luka	-	Russian, Serbian, Croatian, Slovene, Macedonian, Georgian, Old Church Slavic
Tameka	tə-MEE-kə	English