basa-basa
The heavy, noisy flapping of large wings — a heron taking off from a river, a crow launching from a branch, or pigeons startled into flight. Suggests powerful, ungraceful wing movement.
💡Startling a flock of pigeons — 'The pigeons flew up basa-basa in a panic when I walked past.'
カラスがばさばさと羽を広げて飛び立った。
The crow spread its wings basa-basa and took flight.
The heron spread its huge wings ___ and lifted off from the riverbank.
サギが大きな翼を○○と広げて、川岸から飛び立った。