Where does “trig” come from?

Trig comes from Middle English trig, from Old Norse tryggr, from Proto-Germanic triwwiz, from Proto-Indo-European drew-.

trig (English): True; trusty; trustworthy; faithful; Safe;...

Definitions

  1. True; trusty; trustworthy; faithful; Safe;...

Ancestry of “trig”, step by step

trig traces back through two separate lines of ancestry.

via English trigonometry

StepLanguageWordMeaning
1EnglishtrigonometryThe branch of mathematics that deals with the...
2Latintrigonometriatrigonometry
3Ancient Greekτρίγωνονtriangle; one of the Athenian lawcourts; the...
4Ancient Greekτρίγωνοςthree-cornered; three-sided
5Ancient Greekγωνίαcorner, angle; joiner's square; cornerstone
6Ancient Greekγόνυknee
7Proto-Hellenicgónuknee
8Proto-Indo-Europeanǵónuknee

via Middle English trig

StepLanguageWordMeaning
1Middle Englishtrig
2Old Norsetryggrtrue
3Proto-Germanictriwwiztrue; faithful
4Proto-Indo-Europeandrew-hard, firm, strong, solid; hard, fast; tree
5Proto-Indo-Europeandórutree
6Proto-Indo-Europeanderu-firm, solid; wood; be firm, hard, solid

Words derived from “trig

Every word from Proto-Indo-European ǵónu
trig — Etymology, Origin & Word History | Etymology Explorer