KanjiJLPT N1
Smash

smash, break, crush, familiar, popular

Mnemonic

A stone dropped from a ninety-story building hits the ground — Smash! It shatters into a million tiny fragments, dust clouding the air. The higher the drop, the more completely the stone is pulverized. Ninety floors is more than enough to smash anything to bits.
Additional thoughts
Picture yourself at the base of a towering 90-story skyscraper. A boulder tumbles from the roof. The sheer height guarantees total destruction on impact — stone reduced to powder. Height (ninety) plus material (stone) equals complete obliteration.
Quick recall
A stone from ninety stories up hits the ground and smashes to dust.

Details

The keyword for 砕 is smash. This kanji refers to the act of breaking something into small pieces or fragments through forceful impact, such as crushing or shattering a hard object. It conveys a sense of violent destruction that reduces something solid into tiny bits. The character can also be used figuratively, as in breaking down complex ideas into simpler, more digestible parts.
On'yomi
さい
Kun'yomi
くだ.く、くだ.ける

Used in vocab