Can you pronounce the word “shibboleth” correctly? If not, that’s no biggie now, but way, way back in the day, the inability to say that word properly cost about 42,000 Ephraimites their lives.
When, in one of ancient Palestine’s numerous tribal wars, the Ephraimites sought to slip undetected among the Gileadites, the latter asked all comers to pronounce the word “shibboleth” (ear of corn).