びる / びて / びた

The suffix びる (also written ぶる in some analyses, but here specifically びる) attaches to certain nouns and adjective stems to mean "to look like ~", "to appear ~", or "to take on the qualities of ~". It indicates that something or someone has the appearance, manner, or characteristics of the base word – often implying a natural change or impression rather than deliberate pretense.

Since びる functions as an ichidan (る-verb), it conjugates regularly:

• びる – dictionary/non-past form - びて – te-form - びた – past/ta-form (often used as a modifier before nouns)

Common words using びる

びる attaches to a limited set of words. Some of the most frequently seen combinations include:

• おとな大人
  • びる → 大人びる – to appear mature/grown-up
    かのじょ彼女はおとなびた大人びたはなし話しかた方をする。

    She speaks in a mature way.
• ふる古
  • びる → 古びる – to look old/aged/worn
    ふるびた古びたたてもの建物がならんでいる並んでいる。

    Old, weathered buildings stand in a row.
• さび錆
  • びる → 錆びる – to rust (to take on rust)
    てつ鉄のもん門がさびている錆びている。

    The iron gate is rusted.
• あら荒
  • びる → 荒びる – to become desolate/wild
    すさびた荒びたとち土地がひろがっていた広がっていた。

    Desolate land stretched out before us.
• ひな
  • びる → ひなびる – to look rustic/rural
    ひなびたおんせんやど温泉宿にとまった泊まった。

    I stayed at a rustic hot-spring inn.

Key nuance

Unlike ぶる (which implies pretending or acting as if), びる describes a genuine impression or a natural transformation – the subject truly appears or has become that way. For example, おとな大人ぶる means "to act grown-up (pretentiously)," while おとなびる大人びる means "to genuinely seem mature."

The past form びた is especially common as a prenominal modifier (placed before a noun), as in

This suffix is considered literary or somewhat formal and appears frequently in written Japanese and descriptions of scenery, atmosphere, or character impressions.