Where does “semi rig” come from?

semi rig (English) comes from English semi truck, from English truck, from English truckle, from Middle English trokel, from Anglo-Norman trocle, from Medieval Latin trochlea, from Ancient Greek τροχιλία, from Ancient Greek -ῐ́ᾱ — Creates collective nouns, which refer to groups...

semi rig (English): A tractor-trailer; A semi-tractor, the tractor...

Definitions

  1. A tractor-trailer; A semi-tractor, the tractor...

Ancestry of “semi rig”, step by step

semi rig traces back through two separate lines of ancestry.

via English semi truck

StepLanguageWordMeaning
1Englishsemi truckAn 18-wheeler
2EnglishtruckA small wheel or roller, specifically the wheel...
3EnglishtruckleA small wheel; a caster or pulley; A small wheel...
4Middle Englishtrokelcaster, wheel, roller
5Anglo-Normantrocle
6Medieval Latintrochleaa block, sheaf containing one or more pulleys;...
7Ancient Greekτροχιλία
8Ancient Greek-ῐ́ᾱ{{l|en|-ia}}; "suffix forming abstract feminine...
9Proto-Indo-European-íh₂
10Proto-Indo-European-h₂Creates collective nouns, which refer to groups...

via English big rig

StepLanguageWordMeaning
1Englishbig rigA large truck, an 18-wheeler
Every word from Proto-Indo-European -h₂Every word from Ancient Greek -ῐ́ᾱEvery word from Ancient Greek τροχιλία
semi rig — Etymology, Origin & Word History | Etymology Explorer