• 崩くずれる — to collapse; to crumble
• 崩くずす — to break down; to demolish
• 崩壊ほうかい — collapse; breakdown
• 山やまが崩くずれる — a hill or slope collapses
• 体調たいちょうが崩くずれる — one’s condition gets worse
• 雪崩なだれ — avalanche; a mass of snow collapsing down a slope

With the mountain radical 山, 崩 suggests the side of a mountain giving way. What was once solid begins to slip, crack, and fall — perfect for anything that “collapses” or “breaks down,” from cliffs and buildings to plans and health.