Silent

Antonyms of silent:
sound, talking, audible, communicatory, hearable, explicit, noisy, communicative, expressed, articulate, free, garrulous, loquacious, talkative, unreserved, eloquent, fluent, voluble, well-spoken, gabby, talky, outspoken, vocal, facile, glib, silver-tongued, smooth-tongued, speaking, free-spoken, gossipy, talebearing, diffuse, long-winded, prolix, rambling, verbose, windy, wordy, extroverted, gregarious, outgoing, sociable, blabby, chatty, conversational, motormouthed, mouthy, boisterous, clamorous, clangorous, clattering, clattery, raucous, rip-roaring, roaring, roistering, tumultuous, rackety, unquiet, uproarious.
Examples of usage:
  1. She was silent a moment, and then, " You're happy, Bibbs?"
    "The Turmoil A Novel", Booth Tarkington.
  2. I couldn't have believed it was so silent.
    "Masterman and Son", W. J. Dawson.
  3. Let her have her own way: if she wants to talk, let her, and if she wants to be silent, let her alone.
    "The Portion of Labor", Mary E. Wilkins Freeman.