For "to concentrate" (verb):
* ध्यान लगाना (dhyaan lagaana) - This is the most common and general term, meaning "to focus attention" or "to concentrate."
* केन्द्रित करना (kendrit karna) - This literally means "to make centered" and implies focusing on a specific point or task.
* एकाग्र करना (ekagra karna) - This refers to concentrating the mind on one thing, becoming absorbed in it.
For "concentrate" (noun):
* एकाग्रता (ekagrata) - This is the noun form of "ekagra" and means "concentration," "focus," or "single-mindedness."
* सान्द्रता (sandrata) - This literally means "density" and can be used to refer to the concentration of a substance or solution.
The best Hindi word to use will depend on the specific situation and the nuance you want to convey.