What's the difference between i.e. and e.g.?
late 13c. "make a hole in; force one's way through," from Anglo-French perser, Old French percier "pierce, transfix, drive through" (12c., Modern French percer), probably from Vulgar Latin *pertusiare, frequentative of Latin pertusus, past participle of pertundere "to thrust or bore through," from per- "through" (see per) + tundere "to beat, pound," from PIE *tund-, from root *(s)teu- "to push, strike, knock, beat, thrust" (see obtuse). Related: Pierced; piercing.