What is Plato? Possibly it is linked to Platonic love which is ... .. of a relationship which is friendly or affectionate but not sexual. Sounds interesting and what else could a woman or man want or need!
A Platonic Play - Play is defined as a sport or recreational activity - compete in sport or recreation - act on stage .... a story performed on stage. So all is at last clear for the clear minded thinkers of our day!
But what is Partner? either member of a couple in a relationship - or activity - - member of a business partnership - - to be a partner of a partnership - a joint relationship - - between two or more people!
So the next step is to sort out the link between the two words ............Relationship and Partner ... when does a Relationship become a Partnership .... - when it becomes a joint business-like - business venture between two or more people!
The struggle to define words is hard in one's own language but it is even harder in a Foreign Language so I hope at least I have made some attempts to solve it and herein have offered a solution which is the perfect solution! Yours always /on call/ as a TEFL author!