smash

1、smack + mash.
2. sm- (small) + ash. 被打碎、破碎成很小的灰烬。

分析：sm——“神秘”的拼音首字母；ash——灰。
记忆：这个神秘的东西被打的粉碎，成为一堆灰烬了。

smash (v.)

1759, "break to pieces," earlier "kick downstairs" (c. 1700), probably of imitative origin (compare smack (v.), mash (v.), crush (v.)). Meaning "act with crushing force" is from 1813; that of "strike violently" is from 1835. Tennis sense is from 1882. Smash-and-grab (adj.) is first attested 1927.

smash (n.)

1725, "hard blow," from smash (v.). Meaning "broken-up condition" is from 1798; that of "failure, financial collapse" is from 1839. Tennis sense is from 1882. Meaning "great success" is from 1923 ("Variety" headline, Oct. 16, in reference to Broadway productions of "The Fool" and "The Rise of Rosie O'Reilly").

1. He was near to death after a car smash.

他差点在一场撞车事故中丧命。

2. Their car was in a head-on smash with an articulated lorry.

他们的轿车和一辆铰接式货车迎面相撞了。

3. The demonstrators used trucks to smash through embassy gates.

示威者用卡车撞开了使馆大门。

4. They got a battering ram to smash down the door.

他们用一个大木槌把门撞破了。

5. The crowd tried to smash down the door of the police station.

人群试图撞倒警察局的大门。

【grind, crush, crack, smash, clash, crash】
grind: 磨碎
crush: 压碎，压坏；
crack: 破裂；
smash: 打碎；
clash: 着重声音；
crash: 着重破坏

【break, crush, crack, shatter, smash, burst, fracture】
这组词都有“打破、弄碎”的意思，其区别是：
break: 常用词，含义广泛，多指猛然用力将坚硬物打破或损坏。
crush: 指用力把东西压破或变形。
crack: 多指因长期使用或经受压力，物体表现呈现裂纹、裂口或破裂、裂开，但一般没成碎片。
shatter: 指破裂为许多支离破碎的碎片，多用指易碎事物。
smash: 指突然而猛烈地重击某物，使之破碎或完全变形。
burst: 指某物因内部外部压力过大而出现严重破裂、爆开或账破。
fracture: 比crack的破裂程度更深更严重，常指断裂，医学上指骨折。