Where does “escurecimento” come from?

escurecimento (Portuguese) comes from Portuguese escurecer, from Portuguese escuro, from Old Portuguese escuro, from Latin obscurus, from Italian scuro, from Italian oscuro, from Latin obscūrus, from Latin ob- — to throw, reach, pierce; to hit by throwing.

escurecimento (Portuguese): darkening

Definitions

darkening

Ancestry of “escurecimento”, step by step

Step	Language	Word	Meaning
1	Portuguese	escurecer	to dim, darken
2	Portuguese	escuro	dark
3	Old Portuguese	escuro	—
4	Latin	obscurus	dark, dusky, shadowy; indistinct, unintelligible,...
5	Italian	scuro	dark, deep, sombre, swarthy; dark, sombre, grim,...
6	Italian	oscuro	first-person singular present of oscurare; dark;...
7	Latin	obscūrus	—
8	Latin	ob-	towards; against
9	Latin	obolus	obolus
10	Ancient Greek	ὀβολός	obol, obolus, used at Athens as both a weight and...
11	Ancient Greek	ὀβελός	a spit, rod; a horizontal line
12	Ancient Greek	βέλος	missile, arrow, dart; weapon; something quickly...
13	Proto-Indo-European	gʷélHos	—
14	Proto-Indo-European	gʷelH-	to throw, reach, pierce; to hit by throwing

Every word from Proto-Indo-European gʷelH- →