Used to emphasize a statement or degree.

वास्तव में

English Usage: "I really need to finish this work."

Hindi Usage: "मुझे वास्तव में यह काम खत्म करना है।"

An emphatic way to express truth or reality.

सच में

English Usage: "He is really talented."

Hindi Usage: "वह सच में प्रतिभाशाली है।"