Why this word is great
SEMPITERNAL — [Adjective] Everlasting, eternal, specifically with infinite temporal duration. From Old French sempiternel, from Medieval Latin sempiternālis, from Latin sempiternus, a contraction of semper ("always") + æternus ("eternal"). Unlike "eternal" (which can float outside time) or "perennial" (which cycles back intermittently), "sempiternal" is the unbroken river of existence, flowing ceaselessly forward. It is the slow erosion of mountains into sand, the tireless pulse of the tides, the cold glow of stars burning long after their names are forgotten—not timeless, but time-bound, stretching beyond every horizon yet never escaping the weight of its own duration.