tittlebit
noun
Plural: tittlebits
A very small amount; tiny bit.
Examples:
We must not say a word! Not a tittlebit, anent the minorest anyment! (Context: Grandma Estela is recounting the current disclosure restrictions. In her archaic language, she reflects that they are not allowed to say a word, not even the tiniest fragment of any information. Source: J∙ Okram - The Mystery of the Rammed Key.)