Stiction
Static friction that can weld a parked head to the platter — a classic failure of older drives that wouldn't spin up.
The word is a blend of static and friction. When a drive's heads park on the platter surface (contact start-stop design), the ultra-smooth, sometimes lubricated surfaces can bond over time — meniscus forces from the lubricant plus true adhesion — so the spindle motor can't break them free at power-on. The drive clicks and never spins. It plagued 1990s laptop and desktop drives, and the folk remedy was a sharp twist of the whole unit to shock the platter loose. Textured landing pads and, better, ramp load/unload — parking the heads entirely off the disk — engineered the problem away.