He secretly whispered in my ear.
I happened to witness Koichi whispering something in Nikka's ear during the meeting.
I told him to whisper something sexy in my ear and he said, "Do you like tapes and CDs?"
A hit to someone's ear... you'd think that would be like yelling into their ear, but it's not. Think of it like you're hitting your mouth to their ear so that it's nice and close so you can whisper in ear.
This word uses the kun'yomi readings for both kanji, but you know them both now, so you should be able to read this too!