What is the origin of イレーザー? There is a word ``, which means 'eraser'. I suspect this comes from the English word `eraser`. But the "s" sound in `eraser` is not voiced in American English, and a closer approximation in kana will be ``. How did it become voiced as ``? Edit: After fefe's answer, it turned out I was wrong in writing that "s" is not voiced in English. It turned out to be true for American English.

According to Oxford Advanced Learner's Dictionary, the 's' is voiced in British English, and unvoiced in American English.

So may come from the British reading.