Where does “dark crimson underwing” come from?

dark crimson underwing (English) comes from English crimson, from Middle English cremesyn, from Middle French cremesin, from Old Spanish cremesin, from Arabic قِرْمِز, from Persian کرمست, from Sanskrit कृमिज, from Sanskrit कृमि — worm.

dark crimson underwing (English): Catocala sponsa, a species of underwing moth

Definitions

  1. Catocala sponsa, a species of underwing moth

Ancestry of “dark crimson underwing”, step by step

dark crimson underwing traces back through 3 separate lines of ancestry.

via English crimson

StepLanguageWordMeaning
1EnglishcrimsonAPI on Wikipedia.Wikipedia; A deep, slightly...
2Middle Englishcremesyncrimson fabric; Made of crimson cloth;...
3Middle Frenchcremesin
4Old Spanishcremesin
5Arabicقِرْمِزcrimson, kermes; kermes
6Persianکرمست
7Sanskritकृमिजproduced by worms
8Sanskritकृमिa worm, insect; "a spider"; a silk-worm
9Proto-Indo-Aryankŕ̥miṣ
10Proto-Indo-Iraniankŕ̥mišworm
11Proto-Indo-Europeankʷŕ̥misworm

via English underwing

StepLanguageWordMeaning
1EnglishunderwingA hind wing on an insect; A member of the genus...
2EnglishwingAn appendage of an animal's body that enables it...
3EnglishwomanAn adult female human; All female humans...
4Middle EnglishwommanAn female adult person; a woman; The female sex...
5Old Englishwīfmannwoman; female servant; woman
6Old Englishmannperson; man meaning mankind; man meaning adult...
7Proto-West Germanicmannperson, human
8Proto-Germanic*mann-
9Proto-Indo-Europeanmen-to think, mind; spiritual activity; to stay,...

via English dark

StepLanguageWordMeaning
1EnglishdarkHaving an absolute or relative lack of light;...
2Middle Englishderkdark
3Old Englishdeorcdark
4Proto-West Germanicderkdirty; dark
5Proto-Germanicderkaz
6Proto-Indo-Europeandʰerg-o-s
7Proto-Indo-Europeandʰerg-to dim, darken; dim, dull; dark, dusky
8Proto-Indo-Europeandʰer-to support; to hold
Every word from Proto-Indo-European kʷŕ̥mis