drive-by grammar nazi!

[rone]

Take a verb that ends in -ce, such as "service" or "replace".  When you add the -able suffix to adjectivize that word, the result should keep the e.  Do not elide it, or the c will become hard.  "serviceable", "replaceable": good.  "servicable", "replacable": bad.

Comments

[vatine]

Surely teeth are "replacable", if one is lax in using plaque-remover?

[benchilada.livejournal.com]

Beat me to it, you bastard.