Descriptive of how something takes place without warning -

(a)  

A person who is totally lacking in a specified resource or quality -

(a)  

Unsound or rotten as if something is broken down or ruined -

(a)  

Someone who vitiates (reduces the quality of) or produces unacceptable result -

(a)  

To throw into confusion, turmoil, or disorder -

(a)  

The act of causing disorder. An event that results in a displacement or discontinuity -

(a)  

To emerge violently from restraint or limits -

(a)  

To break or burst in suddenly -

(a)  

Incapable of being morally corrupted -

(a)  

To cause or to make a break in the continuity or uniformity of -

(a)  

A complete defeat of an opponent in a battle, competition, or election -

(a)  

A violent incursion or sudden invasion -

(a)  

Characterized by attacks on established beliefs or institutions -

(a)  

A sudden and violent upheaval or disaster that causes great changes in society -

(a)