While "deem" doesn't usually appear as a stand-alone word, it's helpful to understand its prefix as it contributes to the meaning. The prefix "de-" often indicates removal, separation, or reversal.
Here are some examples of words with the prefix "de-":
* deconstruct: to take apart a complex idea
* defeat: to overcome an opponent
* devalue: to reduce the value of something
* depart: to leave a place
* decrease: to become smaller
Even though "deem" is not a stand-alone word, understanding its prefix helps to understand its meaning within phrases like "deemed necessary."