overemphasize

over|em|pha|size /'oʊvər'emfəsaɪz/ (overemphasizes overemphasizing overemphasized)
in BRIT, also use overemphasise
1 [VERB] V n
If you say that someone overemphasizes something, you mean that they give it more importance than it deserves or than you consider appropriate.
Democrats will complain he overemphasizes punishment at the expense of prevention and treatment.
2 [VERB] with brd-neg, be V-ed, V n
If you say that something cannot be overemphasized, you are emphasizing that you think it is very important.
The importance of education cannot be overemphasised...
I can't overemphasize the cleanliness of this place.