foolish
It was foolish to crash.
stupid
It's stupid to play with knives.
easy
It is easy for polar bears to hide polar bears to hide in the snow.
nice
It's nice to give lucky money.
cute
It's cute to watch pandas.
unhealthy
It's unhealthy to eat hamburgers.
safe
It's safe to wear a mask.
fun
It's fun to play football.
unsafe
It's unsafe to play with fire.
fun
It's fun to dance.
rude
It is rude to fart.
brave
It is brave to fight a lion.