1. to slide, to slip off, to get dislocated, to be out of alignment, to get dislodged, to deviate, to shift (position), to be out of sync, to be slightly off, to be off-point
1. to be broken, to break, to fall apart, to collapse, to be destroyed, to be damaged
2. to break (down), to stop working
3. to fall through (of a plan, deal, etc.), to collapse, to break down (of a relationship, negotiations, etc.), to be broken off...