Where does “yesmanism” come from?

yesmanism (English) comes from English yesman, from English MAN, from English manual, from Middle English manuel, from Anglo-Norman manuel, from Old French manual, from Latin manuālis, from Latin manus — human being; man; hand.

Ancestry of “yesmanism”, step by step

yesmanism traces back through two separate lines of ancestry.

via English yesman

StepLanguageWordMeaning
1EnglishyesmanAlternative spelling of yes man
2EnglishMANInitialism of Metropolitan Area Network
3EnglishmanualA handbook; A booklet that instructs on the usage...
4Middle Englishmanuel
5Anglo-Normanmanuelmanual; done with the hands; handle; manual;...
6Old Frenchmanual
7Latinmanuālishand
8Latinmanushand; bravery, valor; violence, fighting
9Proto-Italicmanushand
10Proto-Indo-Europeanman-human being; man; hand

via English ism

StepLanguageWordMeaning
1EnglishismAn ideology, system of thought, or practice that...
2English-ismUsed to form nouns of action or process or result...
3Latin-ismus-ism
4Ancient Greek-ισμόςForms abstract nouns
5Ancient Greek-μόςForms abstract nouns
6Proto-Indo-European-mósCreates action/result nouns from verb stems
Every word from Proto-Indo-European man-