Where does “whistlen” come from?

whistlen (Middle English) comes from Old English hwistlan, from Proto-West Germanic *hwistlōn, from Proto-Germanic hwistlōną, from Proto-Indo-European ḱweys- — to hiss, whistle, whisper.

Ancestry of “whistlen”, step by step

StepLanguageWordMeaning
1Old Englishhwistlan—
2Proto-West Germanic*hwistlōn—
3Proto-Germanichwistlōnąto whistle, hiss
4Proto-Indo-Europeanḱweys-to hiss, whistle, whisper

Words derived from “whistlen”

Every word from Proto-Indo-European ḱweys- →Every word from Proto-Germanic hwistlōną →Every word from Proto-West Germanic *hwistlōn →