Fetching details from the dictionary...
slight movement; slight tremor; quiver
兵士は微動だにせず、直立した。
The soldier stood at attention without even a slight movement.
技術者は橋の支柱に微動を感じた。
The engineer felt a slight tremor in the bridge support.
地震の揺れにもかかわらず、その石像は微動しなかった。
Despite the earthquake's shaking, the stone statue did not budge.