Where does “spectralness” come from?

spectralness (English) comes from English spectral, from English spectre, from French spectre, from Latin spectrum, from Ancient Greek σκοπέω, from Ancient Greek σκοπός, from Ancient Greek σκέπτομαι, from Proto-Hellenic sképťomai — to see, to look, to observe.

spectralness (English): The quality of being spectral or ghostly

Definitions

  1. The quality of being spectral or ghostly

Ancestry of “spectralness”, step by step

spectralness traces back through two separate lines of ancestry.

via English spectral

StepLanguageWordMeaning
1EnglishspectralOf, or pertaining to, spectres; ghostly; Of, or...
2EnglishspectreBritain standard spelling of specter
3Frenchspectreghost, specter; spectrum
4Latinspectrumappearance, image; apparition, specter
5Ancient GreekσκοπέωI look, look at, behold; I examine, inspect; 413...
6Ancient Greekσκοπόςwatcher, lookout; protector, guardian; spy, scout
7Ancient GreekσκέπτομαιI look at, examine; I examine, consider, think
8Proto-Hellenicsképťomaito look at
9Proto-Indo-Europeanspéḱyetito be looking at, to keep looking at
10Proto-Indo-Europeanspeḱ-to see, to look, to observe

via English Ness

StepLanguageWordMeaning
1EnglishNessAn Ulster princess and the mother of Conchobar mac Nessa and Findchoem in the Ulster Cycle of Irish mythology. Daughter of Eochaid Sálbuide. Also the mother of Cormac Cond Longas by incest with Conchobar mac Nessa
2Middle Englishnesse
3Old Englishnæsnot, not at all; not; first/third-person singular...
4Proto-Germanicnasjąfoothill; headland; cape
5Proto-Indo-Europeannéh₂snose
Every word from Proto-Indo-European speḱ-