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To be, or to make something, difficult to understand

complicate

verb

to make something more difficult to do, deal with, or understand

confuse

verb

to make something more complicated or difficult to understand

obscure

verb

to make something difficult to understand

mystify

verb

if someone or something mystifies you, you cannot understand or explain it

baffle

verb

if a problem, someone’s behavior, etc. baffles you, you cannot understand it or solve it

confound

verb

if you are confounded by something, you cannot understand it

deepen

verb

if a mystery deepens, or if something deepens it, it becomes more complicated and difficult to understand

defy

verb

if something defies description, belief, or understanding, it is strange and almost impossible to describe, believe, or understand

be beyond someone

to be too difficult for someone to understand or deal with

be (as) clear as mud

to be very difficult to understand

Open Dictionary

garbage patch

a collection of debris, mostly consisting of plastic, which moves around in the sea …

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