Where does “sourgrass” come from?

sourgrass (English) comes from English sour, from Middle English sour, from Old French essorer, from Vulgar Latin exaurare, from Latin ex, from Latin commūnicō, from Latin commūnis, from Old Latin com(m)oinis — resin.

sourgrass (English): Sorrel; A species of crabgrass, Digitaria...

Definitions

  1. Sorrel; A species of crabgrass, Digitaria...

Ancestry of “sourgrass”, step by step

sourgrass traces back through two separate lines of ancestry.

via English sour

StepLanguageWordMeaning
1EnglishsourHaving an acidic, sharp or tangy taste; Made...
2Middle Englishsoursour, acidic, bitter; foul-smelling, rancid;...
3Old Frenchessorerto fly up, soar
4Vulgar Latinexaurareto rise into the air; to expose to air; to rise...
5LatinexA name of the letter "X"; out of, from
6Latincommūnicōto impart, share
7Latincommūniscommon, commonplace, ordinary, general, universal, shared, shared alike, of both sides, belonging to two or more together
8Old Latincom(m)oinis
9Proto-Italickommoiniscommon
10Proto-Indo-Europeanḱom-moy-ni-held in common
11Proto-Indo-Europeanḱómbeside, near, by, with
12Proto-Indo-EuropeanḱeDeictic particle, here; Post-positional...
13Middle Englishkyt
14Germankittputty certain kinds of cement used for fixing e.g. window panes
15Old High Germankuti
16Proto-West Germanickwidugum, resin
17Proto-Germanickweduzresin

via English grass

StepLanguageWordMeaning
1EnglishgrassAny plant of the family Poaceae, characterized by...
2Middle EnglishgrasA grass; Any plant; especially a herbaceous one;...
3Old Englishgræsgrass
4Proto-West Germanicgrasgrass
5Proto-Germanicgrasągrass
6Proto-Indo-Europeanǵʰreh₁-to become green, grow; to grow; to green, to grow
Every word from Proto-Germanic kweduzEvery word from Proto-West Germanic kwiduEvery word from Old High German kuti