振る舞う

Assuming the sense "fly freely" was the original sense (appears in the Myōgisho), perhaps a contraction of 振るい (furui, 連用形 (ren'yōkei, “stem or continuative form”) of 振るう (furuu, “to sway”)) + 舞う (mau, “to dance”).^[1]

• (Tokyo) ふるまう [fùrúmáꜜù] (Nakadaka – [3])^[1][2][3]
• IPA^(key): [ɸɯ̟ɾɯ̟ma̠ɯ̟]

• (Kyoto) ふるまう [fúrúmáú] (Kōki – [0])^[1]

振(ふ)る舞(ま)う • (furumau) ^{←ふるまふ (furumafu)?}transitive or intransitive godan (stem 振(ふ)る舞(ま)い (furumai), past 振(ふ)る舞(ま)った (furumatta))

1. [from the early 1000s] (ambitransitive) to behave, to conduct oneself
   • 2007, “アンインストール”, 石川智晶 (lyrics), performed by 石川智晶:

     恐(おそ)れを知(し)らない戦士(せんし)のように振(ふ)る舞(ま)うしかない

     osore o shiranai senshi no yō ni furumau shika nai

     There is none else to do than be like a soldier who knows no fear

2. [from 974] (archaic, perhaps obsolete, intransitive) to amend to a plan
3. [from the late 900s] (obsolete, intransitive) to think freely
4. [from the late 1400s] (obsolete, intransitive) to fly freely with the wings flapping (of a bird)
5. [from 1254] (transitive) to treat to food or drink
   • 2025 August 3, 伊藤聖笑, “フルコース　シェフは中学生　８日、知多でレストラン　満席に”, in 中日新聞 [Chunichi Shimbun], 朝刊（市民版） [Nagoya morning] edition, number 29693, 市民 [City], page 15:

     本格的な料理を振る舞うべく準備してきた生徒たちは、８日の本番を楽しみに待つ。

     Honkakuteki na ryōri o furumau beku junbi shite kita seito-tachi wa, yōka no honban o tanoshimi ni matsu.

     The students have been preparing to serve authentic cuisine and are looking forward to the big day on the 8th.