血清[kessei] serum
粛清[shukusei] (political) purge
真清水[mashimizu] pure water
清ます[sumasu] to clear
清む[sumu] to clear (e.g. weather)

清い[kiyoi] clear
清まる[kiyomaru] to be purified
清め[kiyome] purification
清める[kiyomeru] to purify
清らか[kiyoraka] clean

豪爽[gousou] fine disposition
爽やか[sawayaka] fresh
爽快[soukai] refreshing
颯爽[sassou] gallant
爽爽[sawasawa] rustling

爽涼[souryou] cool and refreshing
清爽[seisou] refreshing
英姿颯爽[eishisassou] cutting a fine (dashing, gallant, noble) figure
気分爽快[kibunsoukai] feeling great (refreshed)
心身爽快[shinshinsoukai] feeling refreshed in mind and body