Where does “heavyset” come from?

I cannot write this etymology sentence because the chain provided contains only English entries with no progression to older languages, and the "Known meaning: (unknown)" indicates insufficient data to establish sense development. A valid etymology requires a chain extending to older source languages (such as Old English, Proto-Germanic, etc.) with documented meanings.

heavyset (English): Having a large, solid, imposing bodily...

Definitions

  1. Having a large, solid, imposing bodily...

Ancestry of “heavyset”, step by step

heavyset traces back through two separate lines of ancestry.

via English seṭ

StepLanguageWordMeaning
1Englishseṭof a root, having a final "i" sound in certain...
2EnglishseptA clan, tribe, or family, proceeding from a...
3EnglishsectAn offshoot of a larger religion; a group sharing...
4Middle EnglishsecteA variety or sort; a category with a...
5Old Frenchsectea sect in philosophy or religion
6Late Latinsectaa sect in philosophy or religion, a school,...
7Latinsequipresent active infinitive of sequor; follow, come...
8LatinsequorI follow, come or go after
9Proto-Italicsekʷōrfollow, come/go after
10Proto-Indo-Europeansékʷetorto be following
11Proto-Indo-Europeansekʷ-to follow; to see; to say

via English heavy

StepLanguageWordMeaning
1EnglishheavyHaving great weight; Serious, somber; Not easy to...
2EnglishheaveTo lift with difficulty; to raise with some...
3Middle EnglishhevenTo raise, lift, heave; Alternative form of haven
4Old Englishhebbanto lift, raise
5Proto-West Germanichabbjanto have; to lift
6Proto-Germanichabjanąto have, to hold; to lift, heave
7Proto-Indo-Europeankh₂pyé-
8Proto-Indo-Europeankeh₂p-to seize, grab; to seize; take up; lift; to take,...
Every word from Proto-Indo-European sekʷ-Every word from Proto-Indo-European sékʷetorEvery word from Proto-Italic sekʷōr