Perhaps you've been to חֶבְרוֹן (khev-ROHN) - Hebron, to the Tomb of the Patriarchs. In Hebrew, that site is called מְעָרַת הַמַּכְפֵּלָה (meh-ah-RAHT hah-mahkh-peh-LAH) - the cave of the doubling.
Why doubling? I'm aware of two reasons provided by the Rabbis: 1. Couples are buried there, and 2. The cave is two-storied.
The root of this concept of doubling is כ.פ.ל.
To double something, in Hebrew, is לְהַכְפִּיל (le-hahkh-PEEL). For example, אֲנִי רוֹצֶה לְהַכְפִּיל אֶת כָּמוּת הָאֲנָשִׁים הָרְשׁוּמִים לַבְּלוֹג הַזֶּה (ah-NEE roh-TSEH le-hahkh-PEEL et kah-MOOT ha-ah-nah-SHEEM ha-reh-shoo-MEEM lah-BLOHG hah-ZEH) - I want to double the amount of people signed up to this blog.
Why? Why not?
(It's also great publicity for my program, my bread and butter. But besides that, it gets more and more people connected to and learning the Hebrew language.)
Call to action
If you like your Daily Dose of Hebrew, consider introducing it to a friend or two who might benefit from it as well. That way, we can להכפיל the number of recipients.