Verb (used with object) : to witness an accident. ,She witnessed our wedding. ,He witnessed her will.    From Dictionary.com. 

Noun : to bear witness to her suffering.    From Dictionary.com. 

All we know is where this lion witnesser works, and what he does.    From Wordnik.com.  [grouse Diary Entry] Reference

Keep these accounts unfastened with a balance of 70\% Oregon less and paid on clip and you will witnesser your credit score ascent to great heights.    From Wordnik.com.  [All about credit cards] Reference