basa-tto
The motion and sound of something large and flat falling or being thrown down. Also the flap of large wings.
💡Throwing a newspaper on the table — 'He tossed the report basa-tto on the desk.'
書類をばさっと机に置いた。
He dropped the papers basa-tto on the desk.
The bird spread its wings ___ and took off.
鳥が○○と羽を広げて飛び立った。