Where does “cosicché” come from?

cosicché (Italian) comes from Italian così, from Latin eccum sic, from Latin eccum, from Latin ecce, from Latin -ce, from Proto-Italic ke, from Indo-European *ḱe.

cosicché (Italian): so that

Definitions

so that

Ancestry of “cosicché”, step by step

cosicché traces back through two separate lines of ancestry.

via Italian così

Step	Language	Word	Meaning
1	Italian	così	so; like this/that; thus
2	Latin	eccum sic	thus, accordingly
3	Latin	eccum	behold him; here!, look!
4	Latin	ecce	see!, look!, behold!, points out something with...
5	Latin	-ce	affixed, usually to demonstratives, forming...
6	Proto-Italic	ke	here
7	Indo-European	*ḱe	—

via Italian ché

Step	Language	Word	Meaning
1	Italian	ché	Clipping of perché., comparable to 'cause in...
2	Latin	quod	nominative neuter singular of quī; accusative...
3	Proto-Indo-European	kʷód	what
4	Proto-Indo-European	kʷós	who

Every word from Indo-European *ḱe →