Revert to emacs mode, just change ^w to vi-backward-kill-word.

.zshrc

@@ -58,7 +58,7 @@ precmd() {
     fi
 }
 #
-bindkey -v
+bindkey -e
 typeset -A key
 key[Delete]=${terminfo[kdch1]}
 key[Down]=${terminfo[kcud1]}
@@ -95,6 +95,8 @@ zle -N history-beginning-search-forward-end history-search-end
 bindkey "${key[Up]}" history-beginning-search-backward-end
 bindkey "${key[Down]}" history-beginning-search-forward-end
 #
+bindkey '^w' vi-backward-kill-word
+#
 if [[ "`uname -s`" == "FreeBSD" || "`uname -s`" == "Darwin" ]]; then
     alias "ls=/bin/ls -aFG"
     alias "w=/usr/bin/w -i"