seiso

S1E1I1S1O1

adjective

Pure, proper, and wholesome, especially in the sense of being non-sexual.

Opposite
lewd
Scrabble 5
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Meanings

adjectiveseiso (comparative more seiso, superlative most seiso)

comparative more seiso · superlative most seiso

  1. VTuber fandom slangPure, proper, and wholesome, especially in the sense of being non-sexual.

    I thought Pekora was a pure seiso girl. How could she retweet this?

    2020 July 31, @AlValence, Twitter
    1 more example

    i’ve been streaming for a while and i’m pretty seiso. i don’t enjoy top/bottom jokes or being lewd in general although being slightly sexy is okay.

    2022 November 14, /u/yuviia, Reddit

    Antonyms: lewd

Synonyms & antonyms

adjectivePure, proper, and wholesome, especially in the sense of being non-sexual.

Opposite
lewd

Origin

From Japanese 清(せい)楚(そ) (seiso, “clean, tidy”).

Full word history & related roots →

Rhymes & wordplay

Anagrams

Ossie
Cite this entry
APA

seiso. (n.d.). In WatkinsX Dictionary. Retrieved November 3, 2026, from https://dictionary.watkinsx.com/word/seiso

MLA

“seiso.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/seiso. Accessed November 3, 2026.

Chicago

WatkinsX Dictionary, s.v. “seiso,” accessed November 3, 2026, https://dictionary.watkinsx.com/word/seiso.

Source: seiso on Wiktionary, CC BY-SA 4.0.