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presumably

/pɹɪˈzjuːməbli/ adverb

adverb Definition from WordNet 3.1, Princeton University. Pronunciation from Wiktionary, via Kaikki.org. More about presumably at Wordnik → Where our words come from →

  1. By reasonable assumption.
    presumably, he missed the train

Origin

From presume + -ably, presumable + -ly.

From Wiktionary, via Kaikki.org (CC BY-SA)