Anyway, I think that if you start getting into the habit of using ‘ish’ every now and then, your English will sound more natural. Here are some situations where you could use this suffix:
1- ish and numbers
What time shall we meet?
Used with numbers, -ish means ‘around‘. So not quite seven but around seven. The same is true when you talk about someone’s age: I think she’s fortyish but I’m not sure.
This is a good one if you don’t want to commit yourself too much and if you show up 20 minutes late, you could always say: ‘I said seven-ish not seven sharp!‘ and if you don’t want to say an exact time you can go for ‘I’ll be home soonish‘.
2- ish and adjectives
What does she look like?
Used with adjectives, -ish means ‘fairly’ or ‘slightly’. So she’s not super blond but she still falls into the category of blond. The same happens with colours: What colour is your dress? Bluish.
2- ish and nouns
What’s he like?
He’s childish and boring.
Meaning that he behaves like a child. So if someone has got a girlish face, their face looks like that of a young girl.
Bear in mind that in a formal context the use of the suffix ‘ish’ could sound too colloquial.