What Ricardo and Grace are because Grace hates the terms Friends. She doesn't believe that people that have been together in many different ways can ever just be friends. Ricardo hates Grace and just wants to label her a friend. AND THAT JUST DOESNT WORK. So they are now Each Others.

Briefly, "the realization that each random passerby is living a life as vivid and complex as your own." Originally from the Dictionary of Obscure Sorrows, which has a lot more beautiful neologism definitions like this you might enjoy.

when someone is to gosh darn lazy to add the space between the two words so it sounds more like 'echother'

pronounced as "eee-chough-ther'

Phrase said to answers any question, regardless if it is out of context or not.

Conjunction to differentiate from “each other”