Where does “idolum” come from?

idolum (English) comes from Latin īdōlum, from Ancient Greek εἴδωλον, from Ancient Greek εἶδος, from Spanish -scopio, from Latin -scopium, from Ancient Greek σκοπέω, from Ancient Greek σκοπός, from Ancient Greek σκέπτομαι — to see, to look, to observe.

idolum (English): An insubstantial image; a spectre or phantom; A...

Definitions

An insubstantial image; a spectre or phantom; A...

Ancestry of “idolum”, step by step

Step	Language	Word	Meaning
1	Latin	īdōlum	—
2	Ancient Greek	εἴδωλον	phantom, ghost; shape, figure, image; image of...
3	Ancient Greek	εἶδος	That which is seen: form, image, shape;...
4	Spanish	-scopio	-scope
5	Latin	-scopium	—
6	Ancient Greek	σκοπέω	I look, look at, behold; I examine, inspect; 413...
7	Ancient Greek	σκοπός	watcher, lookout; protector, guardian; spy, scout
8	Ancient Greek	σκέπτομαι	I look at, examine; I examine, consider, think
9	Proto-Hellenic	sképťomai	to look at
10	Proto-Indo-European	spéḱyeti	to be looking at, to keep looking at
11	Proto-Indo-European	speḱ-	to see, to look, to observe

Every word from Proto-Indo-European speḱ- →