In a situation of peril to life and in marriage, falsehood becomes utterable.

In a situation involving the loss of one's entire property, falsehood becomes utterable.

I tried to damn my mood, but found no profanity utterable.

Words not utterable were smothered under Selwyn's breath.

An utterable nausea oppressed me; I was conscious of gasping; there seemed no breath in my body.

Truth may be unutterable, and even falsehood may be utterable where falsehood would become truth and truth would become falsehood.

If Irial believed the words, they were utterable, and he did believe that her blood was the solution they needed to save the Dark Court.