tempered

1 :  treated by tempering; especially, of glass :  treated so as to impart increased strength and the property of shattering into pellets when broken

2 :  having a specified temper —used in combination short-tempered

3a :  having the elements mixed in satisfying proportions :  temperateb :  qualified, lessened, or diluted by the mixture or influence of an additional ingredient :  moderated a pale gleam of tempered sunlight fell through the leaves — W. H. Hudson †1922

4 :  conforming to adjustment by temperament —used of a musical interval, intonation, semitone, or scale