The canonical use of -ish is as a suffix meaning “approximately,” as in bluish, tallish, sixish, or even hungry-ish. This is the definition—the only definition—that you’ll find in Merriam-Webster, ...

Letter Character:Learning the rules for adding suffixes can help you become better spellers. So here’s a quick recap of the ‘Rules for adding the suffixes–er, -ing, -ed, -est and –y.’ VO:Rule 1 is ...