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siffle

intransitive verb
sif·​fle | \ ˈsifəl\
-ed/-ing/-s

Definition of siffle

: to blow or speak with a sibilant sound : whistle, hiss

History and Etymology for siffle

Middle English siflen, from Middle French siffler, sifler, from (assumed) Vulgar Latin sifilare, from Latin sibilare to hiss, whistle

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hubris

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