thud

thud is a   Noun

Definition:

[1] A dull sound without resonance, like that produced by striking with, or striking against, some comparatively soft substance; also, the stroke or blow producing such sound; as, the thrud of a cannon ball striking the earth. At every new thud of the blast, a sob arose. Jeffrey. At intervals there came some tremendous thud on the side of the steamer. C. Mackay.

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