: Igne definitely means the noun "fire," not
: "fiery" or "burning."
: "Ferrum" does mean iron, but it's almost
: always used as a poetic synonym for
: "gladius," sword. This is such a common
: poetic phrase (alongside "he spake winged
: words") that I think it must be used in this
: sense.
Aha! I THOUGHT it was Igne that meant fire! You implied that, since Igne Ferroque was "Fire and Sword" and Ingue Ferroque was "Fire and Groin", they Ferroque meant fire. I initially thought it was Igne that meant fire, but you're the Latin expert and I figured you knew best.
So, if Ferroque is Iron, and Ingue is Groin, then Ingue Ferroque would be "Iron Groin" or, with a little imagination, "Balls of Steel". Maybe Bungie didn't misspell that Marathon level name afterall - you certainly need balls of steel to get through it!