subtilize (v.)

• adulterate
• analyze
• attenuate
• contradistinguish
• cut
• demarcate
• demark
• dematerialize
• differentiate
• dilute
• discriminate
• disembody
• distinguish
• divide
• emaciate
• enervate
• etherealize
• expand
• rarefy
• sap
• screen
• segregate
• select
• separate
• sever
• severalize
• sieve
• sift
• sort
• spiritualize
• subdivide
• thin
• water
• weaken
• winnow