Where does “checkstay” come from?

checkstay (English) comes from English check, from English chequer, from Old French eschequier, from Medieval Latin scaccarium, from Vulgar Latin scaccus, from Arabic شَاه, from Persian شاه, from Middle Persian 𐭬𐭫𐭪𐭠 — to sire, beget.

checkstay (English): A stay, typically adjustable, attached to the mast below the primary backstay, used to control mast bend and stabilize the midsection of the mast, preventing unwanted movement or “pumping”

Definitions

  1. A stay, typically adjustable, attached to the mast below the primary backstay, used to control mast bend and stabilize the midsection of the mast, preventing unwanted movement or “pumping”

Ancestry of “checkstay”, step by step

checkstay traces back through two separate lines of ancestry.

via English check

StepLanguageWordMeaning
1EnglishcheckA situation in which the king is directly...
2EnglishchequerThe edible fruit of the wild service tree,...
3Old Frencheschequierexchequer
4Medieval Latinscaccariumchess board; chessboard; exchequer
5Vulgar Latinscaccuschess
6Arabicشَاهking in chess; king; king or check at chess, shah
7Persianشاهking; shah; king; Something that is the biggest...
8Middle Persian𐭬𐭫𐭪𐭠king
9Old Persian𐏋king
10Proto-Iranianxšáyati
11Proto-Indo-Iraniankšáyatihe rules, he has power over
12Proto-Indo-Europeanteḱ-to sire, beget

via English stay

StepLanguageWordMeaning
1EnglishstayTo prop; support; sustain; hold up; steady; To...
2Middle EnglishstayA stay
3Old Frenchestayeprop, support
4Middle Dutchstaeyea prop, stay
5Middle Dutchstaede
6Old Dutchstada site, place, location, standing
7Proto-Germanicstadizplace, location
8Proto-Indo-Europeanstéh₂tisstanding, position
9Proto-Indo-European*steh₂-
Every word from Proto-Indo-European teḱ-Every word from Proto-Indo-Iranian kšáyatiEvery word from Proto-Iranian xšáyati