Where does “unadequately” come from?

unadequately (English) comes from English unadequate, from English adequate, from Latin adaequatus, from Latin adaequāre, from Latin ad-, from Latin īn-, from Latin în, from Latin en — in.

Ancestry of “unadequately”, step by step

unadequately traces back through two separate lines of ancestry.

via English unadequate

StepLanguageWordMeaning
1EnglishunadequateAlternative form of inadequate
2EnglishadequateEqual to or fulfilling some requirement; To...
3Latinadaequatusequal; adequate
4Latinadaequāre
5Latinad-to; usually prefixed to verbs, in which cases it...
6Latinīn-un-, non-, not
7Latinînin, at, on, upon, from (space)
8Latinenlookǃ beholdǃ; reallyǃ?; come onǃ
9Proto-Italicenin
10Proto-Indo-Europeanh₁énin

via English ly

StepLanguageWordMeaning
1EnglishlyAbbreviation of light-year
2VietnameselyAlternative spelling of li
Every word from Proto-Indo-European h₁én