megaphone

n funnel-shaped device for speaking through, that allows the voice to be heard at a distance 扩音器; 传声筒; 喇叭筒.

medley, Medusa, meek, meekly, meekness, meerschaum, meet, meet up with, meet with, meeting, meeting-house, meeting-place, mega-, megacycle, megadeath, megahertz, megalith, megalithic, megalomania, megalomaniac, megaton, meiosis, melancholia, melancholic, melancholy, melange, melanin, meld, melee, meliorism, mellifluence, mellifluous, mellifluously, mellifluently, mellow, mellowly, mellowness, melodic, melodious, melodiously, melodiousness,