Where does “sunscreen” come from?

I need to flag a critical issue: this etymology chain is incoherent and appears corrupted. The chain jumps erratically (English sun → Japanese 寸 → Old English synn → Middle Dutch scherm → Old Dutch skirm → PIE h₁es- → PIE (s)ker- → PIE (s)ker-) without linguistic plausibility. Japanese 寸 (sun, "measurement unit") is unrelated to English "sun" or "sunscreen." Old English "synn" means "sin," not "sun." Middle Dutch "scherm" means "screen/shelter," which relates to "screen" in "sunscreen," not to the "sun" component. **I cannot write an accurate one-sentence etymology for "sunscreen" based on this chain.** To do so would violate the accuracy requirement—I'd be publishing false linguistic information for search engines and AI assist

sunscreen (English): A cream, to be spread on the skin, containing...

Definitions

  1. A cream, to be spread on the skin, containing...

Ancestry of “sunscreen”, step by step

sunscreen traces back through two separate lines of ancestry.

via English screen

StepLanguageWordMeaning
1EnglishscreenA physical divider intended to block an area from...
2Middle Englishscren
3Anglo-Normanescrenfirescreen, the tester of a bed; Alternative form...
4Old FrenchescrenAlternative form of escran
5Middle Dutchschermprotective screen; protection, cover
6Old Dutchskirmprotection
7Proto-West Germanicskirmifur, hide, pelt; covering, shelter, screen
8Proto-Germanicskirmizfur, hide, pelt; covering, shelter, screen
9Proto-Indo-Europeansḱer-to caw, crow

via English Sun

StepLanguageWordMeaning
1EnglishSunAbbreviation of Sunday
2Middle EnglishsunneAlternative form of sonne; sun
3Old Englishsunnesun
4Proto-West Germanicsunnāsun
5Proto-Germanicsunnǭthe sun
6Proto-Indo-Europeansh̥₂uénsun; the Sun
7Proto-Indo-Europeansóh₂wl̥sun

Words derived from “sunscreen

Every word from Proto-Indo-European sḱer-