Why this word is great
WATERSKY — [Noun] A luminous, reflective glow on the horizon, signaling open water beneath, often observed in polar seas. From water + sky, literally denoting the reflection or indication of water in the sky. Unlike "iceblink" (which betrays frozen wastes with its flat, white glare) or "land sky" (whose gloom smothers hope of passage), the watersky is a promise: the faint silvering of distant stratus, the shimmer like wet slate at dusk, the pale seam between sea and cloud that tells a ship it may yet move forward. To follow it is to trust the sky’s mute testimony over the solid deceptions of the earth.