Where does “mugweed” come from?

mugweed (English) comes from English mug, from English motherfucker, from English fucker, from English -er, from Middle English -er, from Old French -er, from Latin -āre, from Proto-Italic -āō — he, she.

mugweed (English): A slender European weed (Galium cruciata); the crossweed

Definitions

  1. A slender European weed (Galium cruciata); the crossweed

Ancestry of “mugweed”, step by step

mugweed traces back through two separate lines of ancestry.

via English mug

StepLanguageWordMeaning
1EnglishmugEasily fooled, gullible; A large cup for hot...
2EnglishmotherfuckerAn extremely contemptible or mean person; Any...
3EnglishfuckerAn undesirable person; The object of some effort;...
4English-erA person or thing that does an action indicated...
5Middle English-eragentive suffix; agent noun suffix
6Old French-erAlternative form of -ier, verbal suffix;...
7Latin-ārefirst conjugation
8Proto-Italic-āōForms primarily denominative verbs
9Proto-Indo-European-eh₂yétiCreates iterative/ frequentative/ intensive...
10Proto-Indo-European-yétiCreates intransitive, often deponent,...
11Proto-Indo-Europeanyé-
12Chichewaiyehe, she

via English weed

StepLanguageWordMeaning
1EnglishweedAny plant regarded as unwanted at the place...
2Middle Englishweed
3Old Englishwēodweed
4Proto-West Germanic*weudweed (unwanted plant)
Every word from Chichewa iye