Where does “inkproof” come from?

inkproof (English) comes from English ink, from Middle English ynke, from Old French enque, from Latin encaustum, from Latin encaustus, from Ancient Greek ἔγκαυστος, from Ancient Greek ἐν-, from Ancient Greek ἐν — Creates collective nouns, which refer to groups...

inkproof (English): Resistant to ink stains

Definitions

Resistant to ink stains

Ancestry of “inkproof”, step by step

inkproof traces back through two separate lines of ancestry.

via English ink

Step	Language	Word	Meaning
1	English	ink	A pigment -based fluid used for writing, printing...
2	Middle English	ynke	ink
3	Old French	enque	ink
4	Latin	encaustum	the purple-red ink used by the later Roman...
5	Latin	encaustus	burned in, encaustic; the encaustic mode of...
6	Ancient Greek	ἔγκαυστος	burned in
7	Ancient Greek	ἐν-	in, within; on
8	Ancient Greek	ἐν	in, on, at; among; in, at, or during the time of
9	Ancient Greek	δέρμα	skin, hide
10	Ancient Greek	γλυφή	carving, carved work; hole cut
11	Ancient Greek	-ῐ́ᾱ	{{l\|en\|-ia}}; "suffix forming abstract feminine...
12	Proto-Indo-European	-íh₂	—
13	Proto-Indo-European	-h₂	Creates collective nouns, which refer to groups...

via English proof

Step	Language	Word	Meaning
1	English	proof	An effort, process, or operation designed to...
2	Middle English	proof	—
3	Old French	prove	—
4	Latin	proba	test, trial; proof, evidence
5	Latin	probāre	—
6	Latin	probō	to approve, permit, commend
7	Latin	Probus	good, serviceable, excellent, superior, able
8	Proto-Indo-European	pro-bhwo-	being in front, prominent
9	Proto-Indo-European	pro-	toward, forward
10	Proto-Indo-European	por-	to give birth; forward, through; going, passage
11	Proto-Indo-European	per-	before, in front; first; to go through
12	Proto-Indo-European	pr̥tós	passed , crossed

Every word from Proto-Indo-European -h₂ →Every word from Ancient Greek -ῐ́ᾱ →Every word from Ancient Greek ἐν- →