🇰🇷 Korean Origins #59
Folk origin (popular lore)
천둥벌거숭이
A reckless, fearless person who charges about heedlessly, with no sense of danger.
Said to come from the red "beolgeosungi" (red dragonfly) that darts about unafraid even when thunder rolls.
✍️ ONGO · 2026-06-06 · 5 min read
01

Origin Story

Era
Before the Joseon era

People usually assume the "beolgeosungi" in cheondung-beolgeosungi means "a naked person," but the origin handed down is a surprise. Here, beolgeosungi is said to be an old dialect word for a dragonfly — specifically the red dragonfly that stitches the autumn sky in crimson. This red dragonfly flits about without a hint of fear even as thunder crashes and rain pours down. From the image of something that darts heedlessly on despite the danger, people came to call a fearless, harum-scarum person a "cheondung-beolgeosungi" — a "thunder dragonfly." That said, others read beolgeosungi as a naked child, interpreting the word as "a heedless kid running around with no clothes on even as thunder strikes," so it's hard to declare which reading is the true one. Either way, the picture is the same: a reckless soul who charges on, fearless even in the face of danger.

A red dragonfly flying fearlessly through the thunder. To some its recklessness looks like foolishness, but in certain moments it can look just as much like courage that knows no fear.

02

Meaning Evolution

1
Original meaning
Said to refer to the beolgeosungi (red dragonfly) that flies about unafraid even when thunder strikes.
2
Derived meaning
The image of charging about heedlessly, oblivious to danger.
3
Modern usage
A heedless person who blunders about with no sense of fear.
03

How It Is Used

Being new is no excuse to barge in everywhere like a "cheondung-beolgeosungi," all heedless nerve.

As a kid I tore around the neighborhood like a cheondung-beolgeosungi, fearing nothing.

He rushed in like a cheondung-beolgeosungi, with no idea of the danger, and got hurt.

04

Related Words

철부지
Shares the sense of a heedless person who acts without good judgment.
막무가내
Resonates in the way it barrels ahead without weighing the consequences.
벌거숭이
The core root of cheondung-beolgeosungi — an old word that surprisingly meant "dragonfly."
05

Memory Hook

Thunder + beolgeosungi (red dragonfly) → the red dragonfly that flies fearlessly through thunder → a fearless, heedless soul.

"The red dragonfly that flies through thunder knowing no fear — its recklessness became another name for the heedless."

Next Word
삼수갑산
몹시 험하고 멀어 가기 어려운 곳, 또는 그런 곳을 각오할 만큼 절박한 처지
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