In a gentle or quiet manner.

धीरे से

English Usage: She spoke softly to the child.

Hindi Usage: उसने बच्चे से धीरे से बात की।

Relating to speech or spoken words.

बोले गए

English Usage: The softly spoken words had a calming effect.

Hindi Usage: धीरे से बोले गए शब्दों का प्रभाव शांतिदायक था।