響
キョウ, ひび.く
echo, sound, resound, ring, vibrate
JLPT1 G7 S20 F502
鄕 here a variant form of 卿# (be positioned at opposite sides) + 音 sound → transmission of *sound* through space from point of origin to point of reception → *resonance*; *reverberation*.
[Full Kanji Etymology List]