蛍
ケイ, ほたる
lightning-bug, firefly
JLPT1 G7 S11 F2031
As per ?# as described in
榮
(curve about) + 虫 insect → insect (such as a glow-worm) that produces a ring of light → *firefly*. Compare the idea of illumination in
營
.
[Full Kanji Etymology List]