Where does “volcanic lightning” come from?

volcanic lightning (English) comes from English lightning, from English lighten, from English -en, from Middle English -en, from Old English -en, from Old Norse -inn, from Proto-Norse -īna-, from Proto-Germanic -īnaz — adjectival suffix.

volcanic lightning (English): Electrical discharge that occurs during a volcanic eruption, caused by a build-up of static electricity in colliding ejecta (such as ash and debris)

Definitions

  1. Electrical discharge that occurs during a volcanic eruption, caused by a build-up of static electricity in colliding ejecta (such as ash and debris)

Ancestry of “volcanic lightning”, step by step

volcanic lightning traces back through two separate lines of ancestry.

via English lightning

StepLanguageWordMeaning
1EnglishlightningA flash of light produced by short-duration,...
2EnglishlightenTo make brighter or clearer; to illuminate; To...
3English-enDenotes the past participle form when attached to...
4Middle English-enDenotes the past participle form when attached to...
5Old English-enmæġþ + API → mæġden; cocc + API → cycen, cicen;...
6Old Norse-innUsed to create adjectives from nouns, meaning...
7Proto-Norse-īna-
8Proto-Germanic-īnaz-en
9Proto-Indo-European-iHnosCreates adjectives of materials
10Proto-Indo-European-no-adjectival suffix

via English volcanic

StepLanguageWordMeaning
1EnglishvolcanicOf or pertaining to a volcano or volcanoes;...
2Frenchvolcaniquevolcanic
3French-iqueUsed to form adjectives from nouns: -ic, -ical,...
4Middle French-iqueic
5Old French-ique-ic
6Latin-icusbelonging to; derived from; of or pertaining to;...
7Proto-Italic*-ikosforms adjectives with the sense of 'of or pertaining to'
Every word from Proto-Indo-European -no-