Where does “lungsäck” come from?

lungsäck (Swedish) comes from Swedish säck, from Old Norse sekkr, from Proto-Germanic sakkuz, from Latin saccus, from Ancient Greek σάκκος — sack; sackcloth; sackcloth vestment, penitential...

lungsäck (Swedish): pulmonary pleura

Definitions

pulmonary pleura

Ancestry of “lungsäck”, step by step

lungsäck traces back through two separate lines of ancestry.

via Swedish säck

Step	Language	Word	Meaning
1	Swedish	säck	sack; a bag
2	Old Norse	sekkr	sack, big bag
3	Proto-Germanic	sakkuz	sack, bag, purse
4	Latin	saccus	sack, bag; purse, wallet, moneybag; garment of...
5	Ancient Greek	σάκκος	sack; sackcloth; sackcloth vestment, penitential...

via Swedish lunga

Step	Language	Word	Meaning
1	Swedish	lunga	a lung
2	Old Norse	lunga	lung
3	Proto-Germanic	lungô	lung
4	Proto-Indo-European	lengʷʰ-	light, agile, nimble; light, not heavy, agile,...

Every word from Ancient Greek σάκκος →Every word from Latin saccus →Every word from Proto-Germanic sakkuz →