聶
ショウ, ジョウ, ニョウ, ささや.く
whisper
JLPT0 G13 S0 F5000
An element# doubling
耳
ear (= ears) + another
耳
ear → ears figuratively pressed to a whispered voice (or, actually pressed to the lips of the whisperer) → *whisper*.
[Full Kanji Etymology List]