Disconcert – To unsettle, disrupt someone's composure

(Pronounced dis-kuhn-surt)

To remember the definition of the word disconcert, use the following mnemonic:

Discarded rubbish in the countryside is certain (disconcert) to unsettle the wild animals and disrupt their composure. 

Examples of disconcert in a sentence

James would disconcert his parents by coming home after school smelling of smoke.

Nothing could disconcert him, not even seeing a dead body.

I behaved with extreme politeness, which seemed to disconcert them.