moin

See also: Moin, móin, môin, and möin

Bavarian

moin (past participle gmoit) (Central Bavarian)

Conjugation of moin

moin f (plural moins)

moin

moin, moin; moin moin (might be perceived as foreign or artificial in some regions, e.g. Mecklenburg-Vorpommern)

From, or from the same source as, German Low German moin, beyond which the etymology is not clear; see that entry for more.

moin

Increasingly used outside of Northern Germany.

The etymology is not clear.

It stems possibly from moi, moie, moien (“nice, bright, shiny”), from Middle Low German , thus meaning would be '(have a) good one'. This would explain the pronunciation with /ŋ/ in some areas, which would stem from regular inflection of Low German moi.
It is also possible that this word is a borrowing from a Frisian language, which would explain the vowel sequence /ɔːɪ/, which does not naturally occur in almost any Low German dialect.
Further, many sources say that the word comes from the Berlin area, representing the local pronunciation of German Morgen (“morning”): . The pronunciation would come either from local Low German (where the word was pronounced ) and then have undergone r-vocalisation, or from early modern Upper Saxonian (/mɔˤjən/ or something similar), which is the German dialect that initially replaced Low German in Berlin. The word was understood as 'moin' by the rhotic dialects surrounding the city and spread north from them.
Should this word be a West Frisian or Berlinian borrowing, it is likely that it was later conflated with the Low German word moi (/moːɪ/).
A descent, at least partially, from a lost West Slavic dialect has also been hypothesized.

moin

^ Br. v. Braunthal, Berliner Conversation. In den Akademiesälen, in: Berliner Conversations-Blatt für Poesie, Literatur und Kritik. Zweiter Jahrgang, 1828, p. 799ff.
^ Willy Lademann: Wörterbuch der Teltower Volkssprache (Telschet Wöderbuek), Akademie-Verlag, Berlin 1956