If you've mistakenly typed "mumered" instead of the correct word, there are a few suggestions to set things right. The intended word could be "murdered", indicating an act of killing. Alternatively, "murmured" could be the right choice, describing a soft or indistinct utterance. Another possibility is "mumbled", which refers to speaking indistinctly or in a low voice. Remember to proofread to avoid such misspellings.