1. Powerful and clear in expression or effect
   "the document contained a particularly emphatical guarantee of religious liberty";
   - emphatic, forceful, forcible
    
2. Spoken with emphasis
   "an emphatical word";
   - emphatic, emphasized, emphasised [Brit]
    
3. Sudden and strong
   - emphatic, exclamatory

See also: accented, assertive, forceful, self-asserting, self-assertive, stressed