What are the Hebrew/OT/Aramaic equivalents of the words ἀπιστία (unbelief) or ἄπιστος (unbelieving), such as in Romans 4:20? [closed]

I am struck that these words/concepts are used frequently in the New Testament by speakers (Jesus and Paul among others, including Romans 4:20), who would have been (presumably) speaking/thinking in Aramaic/Hebrew, and approaching their th…