VERB (3)

1. echo repeatedly, echo again and again;

2. repeat or return an echo again or repeatedly; send (an echo) back;

3. repeat back like an echo;

The Collaborative International Dictionary of English v.0.48:

Reecho \Re*ech"o\, Re-echo \Re-ech"o\(r[=e]*[e^]k"[-o]), v. t.
   To echo back; to reverberate again; as, the hills reecho the
   roar of cannon.
   [1913 Webster]

   2. To repeat back.

   Syn: echo back.
        [WordNet 1.5] Re-echo

The Collaborative International Dictionary of English v.0.48:

Reecho \Re*ech"o\, Re-echo \Re-ech"o\, v. i.
   To give echoes; to return back, or be reverberated, as an
   echo; to resound; to be resonant; to echo repeatedly, again
   and again.
   [1913 Webster]

         And a loud groan reechoes from the main. --Pope.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Reecho \Re*ech"o\, n.
   The echo of an echo; a repeated or second echo.
   [1913 Webster]

WordNet (r) 3.0 (2006):

reecho
    v 1: echo repeatedly, echo again and again
    2: repeat or return an echo again or repeatedly; send (an echo)
       back
    3: repeat back like an echo