Where does “underactuated” come from?

underactuated (English) comes from English ED, from Japanese エンディング, from English ending, from Middle English ending, from Middle English endyng, from Old English endung, from Old English endian, from Proto-Germanic andijōną — on, onto.

underactuated (English): Insufficiently actuated; simple past tense and...

Definitions

  1. Insufficiently actuated; simple past tense and...

Ancestry of “underactuated”, step by step

underactuated traces back through 3 separate lines of ancestry.

via English ED

StepLanguageWordMeaning
1EnglishEDInitialism of erectile dysfunction; Initialism of...
2Japaneseエンディングending, especially of a broadcast or performance
3EnglishendingA termination or conclusion; The last part of...
4Middle EnglishendingAlternative form of endyng
5Middle EnglishendyngAn ending, termination, or conclusion;...
6Old Englishendungending
7Old Englishendianto end, make an end of; to finish, complete; to...
8Proto-Germanicandijōnąto end, bring to an end, finish
9Proto-Germanicandijazend
10Proto-Indo-Europeanh₂entíosfront; forehead
11Proto-Indo-Europeanh₂ent-face; forehead; front
12Proto-Indo-Europeanh₂en-on, onto

via English underactuate

StepLanguageWordMeaning
1EnglishunderactuateTo make less easily actuated or responsive
2EnglishactuateTo activate, or to put into motion; to animate;...
3Medieval Latinactuatusactuated
4LatinactuoI actuate, activate, implement
5Latinactusmade, done, having been done; act, action, doing,...
6LatinagoI act, I behave; I do or make continuously or...
7Proto-Italicagōdrive; push, impel; do, act
8Proto-Indo-Europeanh₂éǵetito be driving
9Proto-Indo-Europeanh₂eǵ-to drive

via English actuated

StepLanguageWordMeaning
1Englishactuatedsimple past tense and past participle of actuate
Every word from Proto-Indo-European h₂en-Every word from Proto-Indo-European h₂ent-Every word from Proto-Indo-European h₂entíos
underactuated — Etymology, Origin & Word History | Etymology Explorer