rich, strong, undiffused, unmixed, unadulterated, real, unmingled, straight; see also strong 8, thick 1, 3.
Antonyms weak*, diffused, diluted.
intensive, deep, hard; see intense.
"concentrated." YourDictionary, n.d. Web. 06 June 2018. <http://thesaurus.yourdictionary.com/concentrated>.
concentrated. (n.d.). Retrieved June 06th, 2018, from http://thesaurus.yourdictionary.com/concentrated
Not diffused or dispersed:
Intensely sustained, especially in activity:
Having a high concentration of the distinguishing ingredient: