EASY (IER) KANJI - JLPT 4 KYUU

Think of this as a picture of a tall and costly Japanese building

1) kou, 2) taka(i) - high, costly, tall

最高 sai kou - the highest, the best, supreme [not to be confused with 'Psycho'
高校生 kou kou sei - a high school student
高いビル takai biru - a tall building [note: 'biru' is taken from the English, 'buiding']