godan verb (-su), intransitive verb
swing back; rock back
Describes a swinging or rocking motion that returns to a previous position. Often used for physical objects like a pendulum or a cradle, and metaphorically for trends or opinions reverting.
振り子が揺り戻す。
The pendulum swings back.
世論が保守に揺り戻した。
Public opinion swung back to conservatism.
Compound of 揺り (yuri, 'swinging', continuative form of 揺る) and 戻す (modosu, 'to return'). The exact historical derivation is uncertain, but the word transparently combines the ideas of swinging and returning.