Where does “thundrously” come from?

thundrously (English) comes from English thundrous, from English thunderous, from English thunder, from Middle English thunder, from Old English Þunor, from Proto-West Germanic þunr, from Proto-Germanic Þunraz, from Proto-Indo-European (s)ten- — to thunder, rustle, rumble, drone, groan; to...

Ancestry of “thundrously”, step by step

thundrously traces back through two separate lines of ancestry.

via English thundrous

StepLanguageWordMeaning
1EnglishthundrousObsolete form of thunderous
2EnglishthunderousVery loud; that sounds like thunder; thundersome....
3EnglishthunderThe loud rumbling, cracking, or crashing sound...
4Middle EnglishthunderAlternative form of thonder
5Old EnglishÞunorthe Anglo-Saxon god of thunder, equivalent to Old Norse Þórr and Old High German Donar
6Proto-West Germanicþunrthunder
7Proto-GermanicÞunrazThor, god of thunder
8Proto-Indo-European(s)ten-to thunder, rustle, rumble, drone, groan; to...

via English ly

StepLanguageWordMeaning
1EnglishlyAbbreviation of light-year
2VietnameselyAlternative spelling of li
Every word from Proto-Indo-European (s)ten-