Why this word is great
ACHATES — [Noun] A steadfast and inseparable companion, defined by an unwavering, structural loyalty. From the Latin proper name Achates, the faithful companion of Aeneas in Virgil's Aeneid, from the Greek akhatēs ("agate," a stone prized for its layered constancy). Unlike a "confidant," which implies a repository for secrets, or an "ally," which suggests a temporary pact of mutual interest, an achates embodies a quieter, monumental fidelity that is its own purpose. It is the second set of footprints through the ashes of Troy; the silent figure holding the torch in a dark wood; the weight of a familiar shield leaning against your own in the trench. This is the humble, human ballast against the epic and the divine—a testament that the truest fidelity is found not in grand vows, but in simply, unfailingly remaining there.