خنده

From Middle Persian [script needed] (hndytn' /xandīdan/, “to laugh”), from Proto-Indo-European *kʰendʰ-. Cognates with Sogdian [script needed] (γnt- /xand-/, “to laugh”), Northern Kurdish kenîn (“to laugh”), Khotanese khan- (“to laugh”), Baluchi کندگ‎ (kandag, “to laugh”), and Old Armenian խինդ (xind), Northern Luri خںنںە‎ (xənə).

خنده • (xande)

1. laughing; a laugh; laughter
   • 11th century, Abulfazl Bayhaqi, edited by Ali-Akbar Fayyaz, Tarikh-i Bayhaqi, page 83:

     ‏و وی هر کسی را لطف می‌کرد و زهر خنده می‌زد – و به هیچ روزگار من او را با خندهٔ فراخ ندیدم، الا همه تبسم، که صعب مردی بود – و سخت فرو شده بود؛ چنان که گفتی می‌داند که چه خواهد بود.‎‎

     and he was doing acts of kindness to everyone [visiting him] and was doing forced laughing – and in all my life I never saw him with a joyful laugh, except only smiles, since he was a tough man – and he was so thoughtful; such that he knew what was about to happen.

• Steingass, Francis Joseph (1892), “خنده”, in A Comprehensive Persian–English dictionary, London: Routledge & K. Paul