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falling {down, out, away}
drop {ping}
Noun
fall [pl. falls] , {ing}
incidence {phys.}
وقوع [ج. وُقوعات] ، {فزياء}
related Results
frequent (adj.) , [ more frequent ; most frequent ]
frequency (n.) , [pl. frequencies]
to obviate (v.) , [ obviated ; obviated ]
centrality (n.) , {weights & measures}