黙殺

Well Arthur, my Kenkyusha gives:

take no notice of
pass (over) ((a matter)) in [with] silence
refuse [do not deign] even to comment ((on..))
ignore (by keeping silence)

Thinking about it

I could just mokusatsu this thread, but I thought I'd add a little more

http://www.apmforum.com/columns/boye36.htm 

"One of the most common and important time factors in Japanese negotiations or discussions about serious matters was - and still is - the use of time gaps or breaks. Their people involved simply stop talking. They may just sit and remain silent (often with their eyes closed), get up and leave the room for short periods, or hold low-voiced side conversations with their colleagues.

Japanese negotiators and others develop varying degrees of skill in using these time gaps to their own advantage - so much so that there is a special term used in reference to the process: mokusatsu (mohkuu-sahtsuu), which means "killing with silence".

Mokusatsu refers to the idea of "killing" the other party's case or proposition by letting it die in the vacuum of silence."

http://www.weekender.co.jp/LatestEdition/970905/coverstory.html

"A more recent observer has written that Japanese is one of the most effective barriers to mutual understanding ever devised"

This last one made me smile!