The word catalyst comes from the greek word meaning to dissolve. how does this definition relate to the meaning of catalyst

Catalyst is the substance which reduce the activation energy,and decrease the reaction time (that means increase the reaction rate), eventhough it increase the reaction rate it will not undergo any change,at the end of the reaction it will be recovered as usual. 
This definition relate to the meaning of catalyst, why because it dissolve all the complication in the reaction and make the reaction quickly and smoothly.

   Slang, when used as a noun, refers to nonstandard terms or nonstandard usage of standard terms. Slang provides different symbols from which communication messages can be constructed. Slang is more than a noun though. Slang is a process. This means slang is also a verb. We slang as well as speak slang. The process of slanging involves the creation and use of slang. In everyday life, slang reflects the experiences, beliefs, and values of its speakers. Every new generation and subculture has a different vocabulary of slang words. As we slowly come out of adolescence we fade away from the use of slang. Items that we frequently encounter or are important to us are often given slang symbols. There are many terms to say something is good or bad and to evaluate people positively or negatively. Today, slang is also descriptive and contains many symbols for food or eating, money, effective or ineffective performance, relationships, intoxication, and places.
             Why do young adults speak slang? There is one simple reason. It's cool! Slang is cool in the sense of being in style. When we speak, we are communicating not only a message of what we are saying but also a message about who we believe we are, our identity. It is a type of performance and shows that the speaker is in tune with the times. A second reason for why slang is so cool is it lets us have a sense of being acceptable. People don't slang all of the time. Rather, the use of slang is reserved for circumstances that accept the use of slang. Usually, slang is used in informal environments and avoided in formal settings. This is because it could result in the person being judged negatively.