KanjiJLPT N1
Capsize

capsize, cover, shade, mantle, be ruined

Mnemonic

A helicopter is dispatched to restore a flipped boat, but vicious winds catch the rotors and the chopper itself begins to capsize, spinning completely upside down! The crew meant to restore order can only scream as the helicopter plunges inverted into the churning sea.
Additional thoughts
Picture the cruel irony: the helicopter sent to restore calm flips over itself. Rotors slicing water, belly to the sky — the ultimate capsize. The image of an inverted helicopter sinking reinforces the idea of overturning and covering.
Quick recall
A helicopter sent to restore a boat capsizes itself mid-air.

Details

The keyword for 覆 is capsize. This kanji conveys the idea of turning over, overturning, or flipping upside down, much like a boat capsizing in rough waters. By extension, it also carries meanings of covering or concealing, as when something is turned over to hide what lies beneath. The character thus encompasses both the violent act of overturning and the resulting state of being covered or reversed.
On'yomi
ふく
Kun'yomi
おお.う、くつがえ.す、くつがえ.る