to look very happy
बहुत खुश दिखाई देना (bahut khush dikhai dena)
"Her face lit up with happiness when she saw the gift."
"उसे गिफ्ट देखकर उसका चेहरा खुशी से खिल उठा।" (use gift dekhkar uska chehra **khushi se khil uthaa**.)
to continue feeling guilty about something for a long time
to do something with great enthusiasm and energy
to make people more aware of an issue or cause
to demonstrate affection or gratitude toward someone
to keep working on something until it is completed
to suddenly feel or show great happiness