Where does “submucosal” come from?

I can't write this etymology because the chain provided doesn't support "submucosal." The chain traces "aldehyde" back through PIE, but "submucosal" contains the prefix "sub-" and the root "mucosal" (from Latin mucosa), neither of which appears in this chain. To write an accurate one-sentence origin, I would need the actual etymological chain for submucosal itself.

submucosal (English): Situated below or underneath the mucosal tissue

Definitions

  1. Situated below or underneath the mucosal tissue

Ancestry of “submucosal”, step by step

StepLanguageWordMeaning
1EnglishmucosalOf or pertaining to the mucous membranes
2English-álOf or pertaining to. Adjectival suffix appended to various words, often nouns, to produce an adjective form. Often added to words of Latin origin, but used with other words also
3EnglishaldehydeAny of a large class of reactive organic...
4GermanAldehydaldehyde
5Latinalcoholkohl, collyrium, stibium; any other powder...
6Andalusian Arabicكُحُول
7Arabicكحلantimony; kohl, stibnite; black coloring of the...
8Arabicكُحْلantimony; kohl, stibnite
9Akkadianguḫlumkohl, antimony paste

Words derived from “submucosal

Every word from Akkadian guḫlumEvery word from English -álEvery word from Arabic كُحْل