口腔干燥kǒu qiāng gān zào

drymouth; xerostomia

• substandard
• substantial
• substantiate
• substantival
• substantive
• substation
• substitute
• substratum
• substructure
• subsume
• subtend
• subterfuge
• subterranean
• subtitle
• subtle
• subtopia
• subtract
• subtropical
• suburb
• subvention
• subversive
• subvert
• subway
• succeed
• success