To cause someone to feel sad.

दुखी करना

English Usage: The news of his departure was saddening for everyone.

Hindi Usage: उसकी Departure की खबर सबके लिए दुखदायी थी।

Causing or likely to cause sadness.

दुखदायक

English Usage: It was a saddening sight to see the struggling animals.

Hindi Usage: संघर्ष कर रहे जानवरों को देखना दुखदायक था।