The story
- Proto-Indo-European · derived from*peyH-“fat; milk”
- Latin · derived frompiceus“like pitch; pitch-black”
- English todaypiceous
From Latin piceus (“like pitch; pitch-black”) + -ous (suffix forming adjectives denoting possession or presence of a quality). Piceus is derived from pix (“pitch, tar”) (ultimately from Proto-Indo-European *peyH- (“fat; milk”)) + -eus (suffix forming adjectives indicating the sources of attributes). The English word is cognate with Italian piceo (“like pitch; of a dark brown colour”), Spanish piceo (“like pitch; of a dark brown colour”).
Etymology from Wiktionary, CC BY-SA 4.0.