Where does “thrice-monthly” come from?

thrice-monthly (English) comes from English monthly, from English -ly, from English grisly, from Middle English grisely, from Old English grisliċ, from Old English -līċ, from Proto-Germanic *-līk.

thrice-monthly (English): Occurring three times every month; Published...

Definitions

  1. Occurring three times every month; Published...

Ancestry of “thrice-monthly”, step by step

thrice-monthly traces back through two separate lines of ancestry.

via English monthly

StepLanguageWordMeaning
1EnglishmonthlyOccurring every month; Every month; A publication...
2English-lyUsed to form adjectives from nouns, the...
3EnglishgrislyHorrifyingly repellent; gruesome, terrifying;...
4Middle Englishgrisely
5Old Englishgrisliċgrisly, horrible; dreadful, horrid
6Old English-līċsuffix forming {{glossary|adjective}}s meaning...
7Proto-Germanic*-līk

via English thrice

StepLanguageWordMeaning
1EnglishthriceThree times
2Middle Englishthrīce
3Middle Englishthrīethree times, thrice; a third time
4Old Englishþreowathree times, thrice
5Proto-West Germanic*þriwō
Every word from Proto-Germanic *-līkEvery word from English -lyEvery word from Old English -līċ