昧爽 is read as まいそう (maisou) and means dawn.
まいそう
maisou
あいまい
fuzzy
そうかい
refreshing
さんまい
samadhi (state of intense concentration achieved through meditation)
さわやか
clear (voice)
きぶんそうかい
feeling great (refreshed)
しんしんそうかい
feeling refreshed in mind and body