I looked up an idiom in Merriam-webster.

But I couldn't understand why the sentence ends without anything after a preposition "in".

Doesn't it need "something" after "in"?

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    To dumb down X: to lower the general level of intelligence in X. Commented Jun 8, 2021 at 18:44
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    Look at the first example as well: to lower... content of (something, such as a textbook). That also ends with a preposition "of", followed by a parenthetical object, "something". They expect the reader to take that as an example for "to lower the ...level... in". Commented Jun 8, 2021 at 23:23

1 Answer 1


To dumb down [something] means to lower the level of intelligence in [that thing].
The existence of the direct object, and its usage after "in", is implied by the dictionary definition.

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