形容词

1. （人）公平的，明智的，理智的，有判断力的
If you think that someone is fair and sensible you can say that they are reasonable.

1. not excessive or extreme

e.g. a fairish income
reasonable prices

Synonym: fairfairish

2. marked by sound judgment

e.g. sane nuclear policy

Synonym: sane

3. showing reason or sound judgment

e.g. a sensible choice
a sensible person

Synonym: sensible