Discern
To have insight; to see things clearly; to discriminate
Discreet
Prudent, judiciously reserved
Discrete
Unconnected; seperate; distinct
Discriminate
To notice or point out the difference between two or more things
Disdain
Arrogant scorn; contempt
Disinterested
Not taking sides, unbiased
*not to be confused with uninterested
Indiscrete
When things are all jumbled up together; not separated
Disparage
To belittle; to say uncomplimentary things about; usually in a somewhat indirect way