What is the origin of word iffy?

The origin of the word "iffy" is a bit uncertain, but the most likely explanation is that it comes from the Old English word "yfen", meaning "uneven" or "uncertain".

Here's a breakdown of its evolution:

* Old English: "yfen" (meaning "uneven" or "uncertain")

* Middle English: "yffy" (meaning "doubtful", "uncertain", or "unsteady")

* Modern English: "iffy" (meaning "doubtful", "uncertain", or "risky")

The word likely shifted from meaning "uneven" to "uncertain" because of the inherent uncertainty associated with uneven surfaces or situations. It then evolved to mean "doubtful" or "risky," reflecting its association with lack of confidence or clarity.

Interestingly, the word "iffy" has been used since the 16th century, but its usage became more common in the 20th century. It is now a widely used and accepted term in informal English.