🇰🇷 Korean Origins #3
Everyday expressions
미주알고주알
down to the tiniest detail; every little thing, one by one
From mijua (the far end of the small intestine) and gojua (the tailbone near the anus) — probing the deepest, most hidden parts of the body.
✍️ ONGO · 2026-04-06 · 5 min read
01

Origin Story

Era
From traditional Korean medical anatomy

Surprisingly, the root of this word lies in human anatomy. In traditional Korean medicine, mijua (尾周) referred to the very tail end of the small intestine, while gojua (尻周) pointed to the area around the tailbone near the anus. Because these were the deepest, most hidden parts of the body, to "dig up mijua and gojua" came to mean examining something in exhaustive detail, as if probing the innermost recesses of the body. From the end of the intestine to the tailbone — leaving absolutely nothing out, laying everything bare.

The Joseon-era medical classic Donguibogam divided the organs into remarkably fine sections, and the mijua and gojua were the very last regions a physician would examine. To check that far, then, meant you had inspected everything thoroughly, right down to the end.

02

Meaning Evolution

1
Original meaning
Anatomical terms for the end of the small intestine (mijua) and the tailbone (gojua).
2
Derived meaning
A figurative expression for examining something exhaustively, down to the body's deepest parts.
3
Modern usage
A phrase used when going over or recounting every minor detail, one by one.
03

How It Is Used

My mother quizzed me about my whole day, "mijua-algojual," down to every last detail.

The reporter covered the entire affair in exhaustive, blow-by-blow detail.

My friend spilled the whole story of her love life, leaving out nothing at all.

04

Related Words

낱낱이
A synonym meaning "every single one, leaving nothing out."
샅샅이
A similar expression for searching every nook and cranny without missing a spot.
속속들이
An adverb meaning to find out everything, all the way to the innermost depths.
05

Memory Hook

Picture a physician scanning the body from start to finish — from the very end of the intestine (mijua) to the tailbone (gojua).

"The one who looks all the way to the very end is the truly thorough one."

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