Where does “خروس” come from?

خروس (Chagatai) comes from Classical Persian خروس, from Middle Persian hlws, from Middle Persian hlwstn' — to call, cry; to call, to cry.

Ancestry of “خروس”, step by step

StepLanguageWordMeaning
1Classical Persianخروس—
2Middle Persianhlwscock, rooster; rooster, cock
3Middle Persianhlwstn'to call, cry; to call, to cry
Every word from Middle Persian hlwstn' →Every word from Middle Persian hlws →Every word from Classical Persian خروس →