unbetrayable

comparative more unbetrayable · superlative most unbetrayable

1. Not able to be betrayed.

   1926, Hart Crane, “Voyages” VI in The Collected Poems of Hart Crane, New York: Liveright, 1946, p. 110, The imaged Word, it is, that holds Hushed willows anchored in its glow. It is the unbetrayable reply Whose accent no farewell can know.

   2 more examples

   So he betrays, / Not Truth, the unbetrayable, but himself: […]

   1897, Francis Thompson, “[Miscellaneous Poems.] ‘Whereto art Thou Come’.”, in New Poems, Westminster [London]: Archibald Constable and Co., →OCLC, page 185

   It is seven years, thought Sandy, since I betrayed this tiresome woman. What does she mean by “betray”? She was looking at the hills as if to see there the first and unbetrayable Miss Brodie, indifferent to criticism as a crag.

   1961, Muriel Spark, chapter 3, in The Prime of Miss Jean Brodie, London: Macmillan