Make a single word bold throughout entire site

Site URL: http://rituelstudio.co

I posted this before, but my question was not answered. I am trying to make a single word bold throughout the entire website. Not in the title!! It is in the header as one of the menu items and must be bold. Can someone show me how to do this using css?

Thanks for any help!!

Kate

That did it Joseph81! Thank you! I used the second the option you gave. Thank you very much for your help!! Kate