1 middle level (in a hierarchy)

1 junior

2 primary

1 to escalate (in intensity)

2 to go up by one grade

3 to be promoted

4 to upgrade (computing)

1 grade

2 year (in school, college etc)

3 classifier: 个 gè

1 grade

2 rank

3 status

1 to walk slowly up a flight of steps (idiom)

1 saving a life is more meritorious than building a seven-floor pagoda (idiom)