WordWeb Online

1. Using simple and direct language
   "a plainspoken country doctor"
    
2. Characterized by directness in manner or speech; without subtlety or evasion
   "plainspoken and to the point";
   - blunt, candid, forthright, frank, free-spoken, outspoken, point-blank, straight-from-the-shoulder

See also: direct, unrhetorical

Encyclopedia: Plainspoken