KanjiJLPT N3
Overthrow

overthrow, fall, collapse, drop, break down

Mnemonic

Butler Alfred ascends to the peak of the dictator's tower. Drawing a hidden knife, he slashes the ropes supporting the throne platform. The seat collapses in a spectacular overthrow—Alfred watches calmly as the tyrant tumbles from his perch, toppled for good.
Additional thoughts
Picture Alfred, poised and composed at a mountain peak, knife glinting. The visual of cutting ropes to make a throne collapse perfectly captures the idea of toppling or bringing something down. Peak = high point from which one falls; knife = the instrument of that fall.
Quick recall
Butler Alfred at the peak slashes a knife through the throne's ropes to overthrow the tyrant.

Details

The keyword for 倒 is overthrow. This kanji conveys the idea of toppling, knocking down, or causing something to fall over. It encompasses both the physical act of collapsing or falling down and the more figurative sense of defeating or bringing down a regime or authority. It can also express the idea of something being reversed or inverted from its normal upright position.
On'yomi
とう
Kun'yomi
たお.れる、-だお.れ、たお.す、さかさま、さかさ、さかしま