Where does “coalsack” come from?

coalsack (English) comes from English Sack, from Middle English sak, from Old English sacc, from Old English sæcc, from Proto-West Germanic sakku, from Proto-Germanic sakkuz, from Latin saccus, from Ancient Greek σάκκος — sack; sackcloth; sackcloth vestment, penitential...

coalsack (English): A sack for carrying coal; Any of the spaces in...

Definitions

  1. A sack for carrying coal; Any of the spaces in...

Ancestry of “coalsack”, step by step

coalsack traces back through two separate lines of ancestry.

via English Sack

StepLanguageWordMeaning
1EnglishSackA bag; especially a large bag of strong, coarse material for storage and handling of various commodities, such as potatoes, coal, coffee; or, a bag with handles used at a supermarket, a grocery sack; or, a small bag for small items, a satchel
2Middle Englishsakbag, sackcloth
3Old Englishsaccsack, bag
4Old Englishsæccbattle, strife, fighting
5Proto-West Germanicsakkusack, bag
6Proto-Germanicsakkuzsack, bag, purse
7Latinsaccussack, bag; purse, wallet, moneybag; garment of...
8Ancient Greekσάκκοςsack; sackcloth; sackcloth vestment, penitential...

via English coal

StepLanguageWordMeaning
1EnglishcoalA black rock formed from prehistoric plant...
2Middle Englishcolcole; coal
3Old Englishcōlcool, cold, tranquil, calm
4Proto-West Germanickōl(ī)cool
5Proto-Germanickōluzcool
6Proto-Germanickalanąto be cold, to freeze
7Proto-Indo-Europeanǵel-to swallow; swallow
Every word from Ancient Greek σάκκος