Where does “chessclock” come from?

chessclock (English) comes from English chess, from Middle English ches, from Old French eschés, from Arabic شَاه, from Persian شاه, from Middle Persian 𐭬𐭫𐭪𐭠, from Old Persian 𐏋, from Proto-Iranian xšáyati — to sire, beget.

Ancestry of “chessclock”, step by step

chessclock traces back through two separate lines of ancestry.

via English chess

StepLanguageWordMeaning
1EnglishchessA board game for two players with each beginning...
2Middle EnglishchesA set for playing chess; a chess board and chess...
3Old Frencheschéschess; inflection of eschec: ## oblique plural ##...
4Arabicشَاهking in chess; king; king or check at chess, shah
5Persianشاهking; shah; king; Something that is the biggest...
6Middle Persian𐭬𐭫𐭪𐭠king
7Old Persian𐏋king
8Proto-Iranianxšáyati
9Proto-Indo-Iraniankšáyatihe rules, he has power over
10Proto-Indo-Europeanteḱ-to sire, beget

via English clock

StepLanguageWordMeaning
1EnglishclockAn instrument used to measure or keep track of...
2Middle Englishclokkeclock, timekeeping device
3Middle Dutchclockebell; something bell-shaped
4Old Dutch*cloccabell
5Proto-West Germanic*klokkābell
6Medieval Latincloccabell; travelers' cape, literally “a bell”, so...
7Old Irishclocbell; clock
8Proto-Celticklokkosbell
9Proto-Indo-Europeanklēg-
Every word from Proto-Indo-European teḱ-
chessclock — Etymology, Origin & Word History | Etymology Explorer