siffle

Borrowed from French siffler, from Latin sibilāre. Doublet of sibilate.

siffle (plural siffles)

1. A sibilant rale.

siffle (third-person singular simple present siffles, present participle siffling, simple past and past participle siffled)

1. (intransitive) To whistle or hiss.

siffle

1. inflection of siffler:
   1. first/third-person singular present indicative/subjunctive
   2. second-person singular imperative