she is a five-year-old girl
-> she is a girl at her age of 5
she is a girl aged 5
a five-pound note
-> a note valued five pounds
a six-foot-deep hole
-> a hold with a depth of six feet
a ten-story-high building
-> a building at height of ten stories
a building with a height of ten stories
a 100-meter race
-> a race with a length of 100 meters