Where does “semi-invariant” come from?

semi-invariant (English) comes from English invariant, from English variant, from Old French variant, from Latin variāns, from Latin variō, from Latin varius, from Latin vārus, from Proto-Indo-European h₂wer- — to burn; to cover, heed, notice; squirrel.

Ancestry of “semi-invariant”, step by step

semi-invariant traces back through two separate lines of ancestry.

via English invariant

StepLanguageWordMeaning
1Englishinvariantnot varying; constant; Unaffected by a specified...
2EnglishvariantShowing variety, diverse; Showing deviation or...
3Old Frenchvariantvarying; which varies
4Latinvariānsdiversifying; variegating
5Latinvariōto diversify, variegate, change, transform, make different or various, alter, vary, interchange
6Latinvariusdiverse, different, various, variegated
7Latinvārus
8Proto-Indo-Europeanh₂wer-to lift up; to moisten; to flow; to raise, hang
9Proto-Indo-Europeanwēr-true
10Proto-Indo-Europeanwer-to burn; to cover, heed, notice; squirrel

via English semi

StepLanguageWordMeaning
1EnglishsemiA semi-detached house; A semitrailer; a...
2Englishsemi-half; partial, incomplete; somewhat, rather,...
3Latinsēmi-half
4Proto-Indo-Europeansēmihalf; partially
Every word from Proto-Indo-European wer-Every word from Proto-Indo-European wēr-Every word from Proto-Indo-European h₂wer-