deponent adjective & noun. 
[dɪ'pǝʊnǝnt] LME.[Latin deponent- pres. ppl stem of deponere: see DEPONE, -ENT.]A. adjective. 
Grammar. Of a verb: passive (in Latin) or middle (in Greek) in form, but active in sense. 
LME.b. noun.
1.  A deponent verb. 
M16.2.  A person who makes a deposition under oath; a person who gives written testimony or makes an affidavit for use in court etc. 
M16.►  Deponent verbs were so called from the notion that they had laid aside a passive sense. In fact they were orig. reflexive. 
 [TahlilGaran] English Dictionary ▲