tonk

باللغة العربية: صَوْتُ طَرْقٍ أَجْوَف، ضَرْبَةٌ قَوِيَّة

1. A sound produced by knocking on something hollow.
2. A resounding strike of the ball; a powerful hit of the ball with the bat. (colloquial)

الجمع tonks