Discreet vs Discrete

Discreet - cautious, sensible;

Discrete - detached, separate.

Examples:

You should be discreet with your comments at funerals.

The Lego building set contained 400 discrete pieces.

discreet adj. Showing discernment or judgement in the guidance of one’s own speech and action; judicious, prudent, circumspect, cautious; often esp. that can be silent when speech would be inconvenient.    

Example: Sometimes, we need to be discreet when talking to a rape victim.

discrete adj. Separate, detached from others, individually distinct. Opposed to continuous.

Example: James strongly believed that his car has a discrete value than his house.

sources: Daily Writing Tips| Learn English with Pictures