What part of speech is the suffix ish?

The suffix "-ish" is a suffix. It is not a part of speech itself, but it is used to form adjectives.

Here's how it works:

* It modifies a noun or adjective to indicate an approximation, resemblance, or degree:

* Red + ish = reddish (slightly red)

* Child + ish = childish (like a child)

* Sweet + ish = sweetish (somewhat sweet)

Therefore, "-ish" is a suffix that helps create adjectives by modifying other words.