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Persian dōāb, from dō two (from Middle Persian) + -āb water, from Old Persian āpi-; akin to Avestan dvā- two, Sanskrit dva, and to Avestan āp- water
do a bad job
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“Doab.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/doab. Accessed 13 Aug. 2022.
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