immeasurable

1. not comparableimpossible to measure

   Give me your hand, and in a few minutes we shall be in my own dwelling, amid those immeasurable deserts where only my story may be communicated.

   1832, Letitia Elizabeth Landon, Heath's Book of Beauty, 1833, The Enchantress, pages 12–13

   1 more example

   There is also the former Great Central main line which, though it climbs to an almost equal altitude at Dunford, has the immeasurable advantage of electric traction.

   1960 March, Cecil J. Allen, “Locomotive Running Past and Present”, in Trains Illustrated, page 175

2. not comparablevast

   My disappointment is immeasurable and my day is ruined.

   2017 July 5, TheReportOfTheWeek, 6:03 from the start, in Popeyes Cheddar Biscuit Butterfly Shrimp - Food Review, via YouTube, archived from the original on 28 Jul 2017

   1 more example

   "His contribution has been immeasurable," Bush said in a statement. "I value his judgment, and I treasure his friendship."

   2007, Terence Hunt, “Longest-serving Bush aide resigns”, in Associated Press

plural immeasurables

1. anything that cannot be measured

   And inspiring good relationships is all about immeasurables: it is about inspiring purpose, compassion and attentiveness.

   2009 September 29, Madeleine Bunting, “Forget 'clients' and 'users' – public services are about people”, in Guardian