1) SUFFIX -ish is added to adjectives to form adjectives which indicate that someone or something has a quality to a small extent. For example, something that is largish is fairly large.
She is tallish, brown-haired, and clear-skinned...
With her was a youngish man in a dinner jacket.
...a tank of greenish water.2) SUFFIX -ish is added to nouns and names to form adjectives which indicate that someone or something is like a particular kind of person or thing. For example, `childish' means like a child, or typical of a child.
She had entirely lost her girlish chubbiness.
...a man of monkish appearance.
...his affecting, Tom Petty-ish voice.3) SUFFIX -ish is added to words referring to times, dates, or ages to form words which indicate that the time or age mentioned is approximate.
I'll call you guys tomorrow. Noon-ish...
The nurse was fiftyish.
English dictionary. 2008.