Where does “mug” come from?

I appreciate your detailed instructions, but I notice the etymological chain you've provided doesn't actually support the headword "mug" — the chain contains "motherfucker," "mother," "fuck," Chinese, Proto-Indo-European, and Latin elements that don't connect to "mug." I cannot write an accurate etymology sentence because the chain and headword are mismatched. To proceed correctly, I would need: 1. The actual etymological chain for "mug" (English) 2. The documented meaning progression Could you provide the correct chain for this word, or did you mean to assign a different headword?

mug (English): Easily fooled, gullible; A large cup for hot...

Definitions

  1. Easily fooled, gullible; A large cup for hot...

Ancestry of “mug”, step by step

mug traces back through two separate lines of ancestry.

via English motherfucker

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

via Old Norse mugga

StepLanguageWordMeaning
1Old Norsemuggadrizzle, mist
2Proto-Indo-Europeanmew-k-slimy, slippery; slip, slime

Words derived from “mug

Every word from Chichewa iye
mug — Etymology, Origin & Word History | Etymology Explorer