fall away
Upper Intermediate (B2)neutral
To slowly get smaller, weaker, or to drop off something.
"Beyond the fence, the land fell away sharply into a deep ravine."
Hear it in context

Spring Doubles Championship Europe & South America
Brawlhalla · 238:16
Fall away.

Joe Rogan Experience #2490 - RZA
PowerfulJRE · 134:13
You can fall away.

The Future of Glaciers: Crash Course Geology #19
CrashCourse · 3:09
fall away, or melt away.

How the Ottomans Became a Superpower and Tripled in Size
Kings and Generals · 90:04
Byzantine Christian imagery to fall away,

How are political parties really feeling ahead of May elections? | BBC News
BBC News · 32:57
terrible fall away dramatically in their support.