Where does “nontasty” come from?

nontasty (English) comes from English tasty, from English taste, from Middle English tasten, from Old French taster, from Vulgar Latin tastare, from Latin taxāre, from Latin Taxus, from Ancient Greek εἶδος — to look at.

Ancestry of “nontasty”, step by step

nontasty traces back through two separate lines of ancestry.

via English tasty

StepLanguageWordMeaning
1EnglishtastyHaving a pleasant or satisfying flavor;...
2EnglishtasteOne of the sensations produced by the tongue in...
3Middle EnglishtastenTo taste; To partake in or ingest; To examine by...
4Old Frenchtasterto taste; to touch; to hit; to strike
5Vulgar Latintastareto touch, feel; present active infinitive of...
6Latintaxāre
7LatinTaxusyew
8Ancient GreekεἶδοςThat which is seen: form, image, shape;...
9Spanish-scopio-scope
10Latin-scopium
11Ancient GreekσκοπέωI look, look at, behold; I examine, inspect; 413...
12Ancient Greekσκοπόςwatcher, lookout; protector, guardian; spy, scout
13Ancient GreekσκέπτομαιI look at, examine; I examine, consider, think
14Proto-Hellenicsképťomaito look at

via English non

StepLanguageWordMeaning
1EnglishnonObsolete form of none
2Frenchnonno; not; a no, a negative response
3Old Frenchnonno; not; Alternative form of nom
4Latinnōnnot
5Old Latinnoenum
6Proto-Indo-Europeanóynosone; single
Every word from Proto-Hellenic sképťomai