From Chat:
I now heard on the radio, there is such a word, it turns out: Mamihlapinatapai (sometimes written by mamihlapinatapei, usually read as mamihlapinatapei) - a word from the Yagan language of the Yagan tribe (Fire Earth), is listed in the Guinness Book of Records as "the most comprehensive word" and is considered one of the most difficult words to translate. It means “the look between two people, which expresses the desire of each one that the other will be the initiator of what they both want, but no one wants to be first.” beautifully...
yyy is beautiful)
zzz: "tweethinking"