The word Playing occupies an extensive space in the semantics of the of the English language, which does their translation and uses in other languages an adventurous enterprise.
In the course of our project more that of any other we became aware of the difficulties no just of the meaning, but much more in the way of focusing on the relationships that Playing as a word entertain in the myriad of implications, attributes, sequences and consequences that implies.
As origins of the word we can find:
before 900; (noun) Middle English "pleye", Old English "plega"; (v.) Middle English "pleyen," Old English "pleg(i)an" (cognate with Middle Dutch "pleien" to leap for joy, dance, rejoice, be glad)

As Synonyms, many, some of the most important can be:
2. show. 3. diversion, pastime. Play, game, sport refer to forms of diverting activity. Play is the general word for any such form of activity, often undirected, spontaneous, or random: Childhood should be a time for play. Game refers to a recreational contest, mental or physical, usually governed by set rules: a game of chess.Besides referring to an individual

 

 

Interesting is that we can find just one single Antonym, just one:
Work