結構

The word 結構 can be used to mean "pretty", "fairly", or "rather." It means that the degree of something is higher than average, but not extraordinarily so.

この辞書のサイトは結構便利なので、よく使う。
This dictionary's site is pretty useful, so I use it a lot.

この新入生は結構かわいいけど、ちょっと不器用みたいんだな。
The new girl is pretty cute, but she also looks kind of clumsy.

子供は５歳ぐらいになれば、一人で結構何でも出来るようになる。
Once a child reaches about 5 years old, they can do pretty much anything on their own.

マクドナルドの食べ物は結構美味しいけど、バーガーキングが好きだよ。
McDonald's food is pretty good, but I prefer Burger King.