edgeways \edge"ways\, edgewise \edge"wise\, adv.
   with the edge towards anything; in the direction of the edge.
   1913 webster

   to get a word in edgewise to succeed in expressing an
      opinion in a conversation, in spite of constant speech
      from another or others; as, he talked incessantly and i
      couldn't get a word in edgewise.

   note: the form edgeways is now uncommon.
         pjc

               glad to get in a word, as they say, edgeways.
                                                  --sir w.
                                                  scott.
         1913 webster
see also:
to get a word in edgewise edgeways 

edgeways
     adv 1: as if by an edge; barely; "i could not get a word in
            edgewise" syn: edgewise
     2: with the edge forward or on, by, or toward the edge; "he
        sawed the board edgeways"; "held it edgewise" syn: edgewise
see also:
edgewise