painful, fearful
恫 centers on a state of distress that combines physical pain and emotional fear. The two given meanings are closely linked: something painful is often fearful, and fear itself can feel painful.
恫 combines the heart radical 忄 with 同, which likely provides the sound. The heart radical suggests an emotional or internal state, fitting the meanings of pain and fear.
The heart radical 忄 next to 同 (same) suggests a heart that feels the same painful fear as someone else. Imagine your heart aching in sympathy when you see another person in distress.
For ドウ, picture a painful, fearful situation where you hear a deep, echoing sound like a gong: 'doh' -> ドウ. The sound resonates in your heart, making the fear feel physical.
intimidation; threat; bluster