vaguen

verb2

1. •
   (informal) To make (something) vague or more vague; to blur, to obscure.

   • [Rosemary] Pountney sees the term ‘vaguen’ in the play’s second typescript as ‘explicit testimony to [Samuel] Beckett’s policy of “vaguening” the later drafts of his plays’ (1988: 149). — 1988
2. •
   (informal) To become (more) vague; to blur.