Akademik

thrumming
\\ˈthrəmiŋ, -mēŋ\ noun (-s)
Etymology: thrum (I) + -ing
: a mass of tufts or short pieces of rope yarn used in thrumming canvas

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thrummˈing noun and adjective
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Main Entry:thrum

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thrumming, vbl. n. and ppl. a.
see thrum v.3

Useful english dictionary. 2012.