Word of the Day
1 A clear, high-pitched sound made by forcing breath through a small hole between partly closed lips, or between one’s teeth.
1.1 A shrill, high-pitched sound.
1.2 An instrument used to produce a shrill, high-pitched sound, especially for giving a signal.
Emit a shrill, high-pitched sound.
From rhyming slang whistle and flute.
It is expedient to whistle up an alternate word when the one on offer from the dictionary is offensive. Besides, I had the image ready from a recently completed 3D printing project