Answer: whispering

AnswerCrossword Clue
WHISPERINGGossip
WHISPERINGClassroom taboo
whisperingBe rumored
whisperingSpeak very softly using one's breath without one's vocal cords, esp. for the sake of privacy
whispering(of leaves, wind, or water) Rustle or murmur softly
whisperingWHISPER, to speak softly