无妄之灾

unexpected disaster

无的英语翻译：

naught; nonexistence; not; nothing; without; lack; zero
【医】 a-; leipo-; lipo-; non-

妄的英语翻译：

absurd; preposterous; presumptuous; rash

之的英语翻译：

go; leave; of; somebody; something; this

灾的英语翻译：

calamity; disaster; personal misfortune