co--   

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together            

            codirector - direct together

            coexist - exist together

therap / therapy   

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      treatment

~ spelling~ therap   =   therap    +    vowel

            therapist – one who practices treatment

            biotherapy - treatment of life

-- ous / ious / eous   

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having to do with

            bicephalous - having two heads

            religious - having to do with religion

card / cardi / cardio     

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heart

            cardiologist - expert in the  study of the heart

            cardioid - resembling the heart

sub --  

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under/below    

            subfloor - the floor underneathsubstandard – below the standard 

lateral

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side

            unilateral - one sided

            unilateralism - the belief in one side

caco

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bad    (abnormal / evil)

~ spellingcaco    =     cac + vowel

            cacogastric - having to do with a bad stomach

            cacophony – bad sounds