rotating
回転する
解説 Definition
rotating は rotate（回転する、回転させる）の現在分詞・動名詞です。物が軸を中心に回っている様子や、順番に交代していく動きを表すときに使います。
The present participle or gerund of rotate, describing continuous movement around a central point or axis, or the action of changing people, duties, or positions in a regular sequence.
覚え方のコツ Memory Tip
原形 rotate の語末の e を落として -ing を付けた現在分詞・動名詞です。ラテン語 rota「車輪」と結び付け、軸の周りを車輪のように回り続ける像で覚えます。a rotating fan や rotating wheel のように進行中の回転を表します。turning は単に向きを変える場合にも広く使えますが、rotating は軸や中心を基準とする規則的な回転に向く語です。
Rotating is formed from rotate by dropping the final silent e and adding -ing. Connect it with rotation and rotor, then picture a wheel moving repeatedly around its center. This makes examples such as a rotating fan, wheel, or sign easy to visualize. The form can act in a continuous verb phrase, “The fan is rotating,” as an adjective, “a rotating wheel,” or as a gerund. Turning is a broader everyday word and may mean simply changing direction; rotating more clearly suggests movement around an axis or a regular change through a sequence.
例文
The fan is rotating slowly.
扇風機がゆっくり回転しています。
A rotating wheel moved the machine.
回転する車輪が機械を動かしました。
The camera filmed the rotating sign.
カメラは回転する看板を撮影しました。
rotating の類義語・関連語
対義語
紛らわしい語
rotating の語源・成り立ち Etymology
ラテン語 rotare（回す）から。語根 rota は「車輪」を意味し、rotation（回転）や rotor（回転子）も同根。車輪が繰り返し回る様子が原義で、日本語の「ローテーション」もここから来ている。
Rotate comes from Latin rotare, “to turn around or cause to revolve,” which was formed from rota, “wheel.” English adopted rotate in the early modern period, and later formed related technical words such as rotation and rotor. Rotating is the present-participle and gerund form, produced by dropping the final silent e before -ing. The later sense of alternating people or duties also reflects circular, repeated movement through a sequence.
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