unreturnability en · NOUN
Etymology
From un- + returnability.
Meanings
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(uncountable) The quality of being unreturnable.
The opponent who answers the service, if he or she is able to return it, is now in a position to address the server, and he or she, too, will seek to imbue the return not only with answerability—that is, by sticking to the rules of the game like putting the return within the boundaries, for instance—but also with unreturnability.
2016 [2006], Robert Perinbanayagam, “The Self at Play: The Self in Time, Place, and Position”, in Games and Sport in Everyday Life: Dialogues and Narratives of the Self, Abingdon: Routledge, →ISBN, page 116: