Practise the thinking. Keep the judgement.
高い (takai): High; tall; expensive
たかい
takai
Meaning
High; tall; expensive
Two original examples
このかばんは高いです。
This bag is expensive.
あの人は背が高いです。
That person is tall.
Usage and distinctions
高い describes height, level or price. The noun supplies the meaning: 高い山 is a high mountain, 高い声 a high-pitched voice. 背が高い describes a tall person. Its past negative is 高くなかった.