macbookair:MacOS sugiura$ pwd
/System/Library/Input Methods/Kotoeri.app/Contents/Support/DictionaryTrainer.app/Contents/MacOS
macbookair:MacOS sugiura$ ls -ltar
total 232
-rwxr-xr-x 1 root wheel 313648 10 4 2009 DictionaryTrainer
drwxr-xr-x 9 root wheel 306 4 2 2010 ..
drwxr-xr-x 3 root wheel 102 4 2 2010 .
macbookair:MacOS sugiura$ sudo chmod -x DictionaryTrainer
Password:

おお、ファンが静かになった。