There Is No Such Thing As "Samurais"

The plural of "cupful" is "cupfuls."

The plural of "medium" is "media."

The plural of "samurai" is "samurai."

The plural of "crisis" is "crises."

The plural of "passer-by" is "passers-by".

The plural of "wife" is "wives."

The plural of "mother-in-law" is "mothers-in-law."

The plural of "phenomenon" is "phenomena."

The plural of "criterion" is "criteria."

The plural of "datum" is "data."

Photo for illustration purposes only.