Je was op zoek naar: silex (Latijn - Engels)

silex
silex, silicis pebble/stone, flint; boulder, stone;

sermo meus silex
my word is pronounced for the sake of friendship

sagittae eius acutae et omnes arcus eius extenti ungulae equorum eius ut silex et rotae eius quasi impetus tempestati
whose arrows are sharp, and all their bows bent, their horses' hoofs shall be counted like flint, and their wheels like a whirlwind: