Learned supremacy and dive into or in. Thank you.

 

su·prem·a·cy /səˈprɛməsi/ noun

 

[noncount] : the quality or state of having more power, authority, or status than anyone else : the state of being supreme
▪ military/economic supremacy ▪ a battle/struggle for supremacy

URL: http://www.learnersdictionary.com/search/supremacy

7 informal : to start doing something with enthusiasm — usually + into or in ▪ They dove into their work. ▪ I'm just not ready to dive (right) into another romantic relationship. ▪ They sat down at the dinner table and dove (right) in. [=started eating immediately] ▪ We have a lot of things to discuss, so let's dive right in. [=let's get started immediately]

URL: http://www.learnersdictionary.com/search/dive