If you're familiar with Rabbinic law and literature, you probably know the word for mourner - אָבֵל/אָבֵלָה (ah-VEHL - m; ah-veh-LAH - f), as well as the word for mourning: אָבֵלוּת (ah-veh-LOOT).
Here's how to say to mourn: לְהִתְאַבֵּל (le-heet-ah-BEHL).
Why this word today?
I wish אבלות on no one. But today is the day before the ninth of the Jewish month of אָב (ahv), the national Jewish day of mourning for the destruction of Jerusalem and the holy Temple - the loss of goodness emanating throughout the world.
Today's "three-weeks" call to action?
I'd like to connect to this אבלות more myself, to what this is all about, that the Jewish people is still mourning after thousands of years, even after Jerusalem is quite well built today... and yet there is what is lacking.
Let's reflect on this אבלות, the day before תִּשְׁעָה בְּאָב (teesh-AH be-AHV).