What does 幽玄 Yugen mean?

Yugen (幽玄) names beauty that is suggested rather than shown. Zeami made it the standard of excellence in Noh, above straightforward imitation.

Written
幽玄 (yūgen)
Literally
幽 (yu, dim, secluded, faint) with 玄 (gen, dark in the sense of deep or unfathomable). A beauty that is suggested rather than displayed.
As slang
A critical term, not conversational. It belongs to writing about Noh, poetry and aesthetics rather than to daily speech.
In anime
Not usually named, often attempted: the shot that withholds, the scene whose meaning is left off screen, the ending that declines to explain.

Yugen names a beauty that works by suggestion. Not what is shown, but what the showing implies is there and does not present: the thing behind the gesture.

The characters

幽 (yu) is the dim, the secluded, the faintly perceived; it appears in words for the shadowed and the otherworldly. 玄 (gen) is dark in the sense of deep, carrying depth rather than an absence of light.

Both characters point away from clarity. The compound is built out of two kinds of obscurity, which is a strong signal about what the term values.

Zeami and the standard of Noh

Zeami, the playwright and theorist who shaped Noh in the fourteenth and fifteenth centuries, wrote extensively about performance and set two elements against each other. One was the imitation of things: representing the world accurately. The other was this, the suggestive and spiritual dimension, and he placed it above the first as the measure of excellence.

His formulation is that the beauty concerned is gentle and true rather than merely striking, and that a performance succeeds when it implies something the text and the gestures never state. The performer's task is not to show the audience the thing; it is to make the audience aware that the thing is there.

English can describe it perfectly well

Writing about this term reaches with tedious regularity for the claim that it cannot be rendered in English, and the paragraphs above are a standing refutation. English criticism has adjacent vocabulary in the sublime, in understatement, and in the idea of a work leaving something unsaid.

What English lacks is a single noun for it, and specifically a noun that names it as an achievable technical standard rather than as a happy accident. A director can be told to aim for this and know what is being asked, which is a different situation from being told to be evocative.

The practical version

It is a discipline of withholding, and the discipline is the difficult part. Anyone can leave something out; the standard is that what remains must make the absence felt as a presence.

Work that fails this is not mysterious, it is merely unclear, and the distance between the two is where the whole idea lives.

Quick answers

What does yugen mean?

幽 (yu, dim, secluded, faint) with 玄 (gen, dark in the sense of deep or unfathomable). A beauty that is suggested rather than displayed.

Is yugen an insult?

A critical term, not conversational. It belongs to writing about Noh, poetry and aesthetics rather than to daily speech.

What does yugen mean in anime?

Not usually named, often attempted: the shot that withholds, the scene whose meaning is left off screen, the ending that declines to explain.