What is the meaning of "Kirbam Bateimo l'Olam"?
Rashi: They intend to build houses that will last forever.
Radak #1: Some reverse the letters of Kirbam; it is like Kivram - the grave is their permanent house.
Radak #2: The prefix 'Beis' is omitted from two words. It is as if it says b'Kirbam b'Bateimo - they think that they will stand in their houses forever. Alternatively, Bateimo explains the suffix Mem in Kirbam (in their houses), just like "Hineni Ma'achilam Es ha'Am ha'Zeh" (Yirmeyah 9:14). They so much pursue money and buildings, as if they will dwell forever in the pleasure palaces that they build.
Malbim: It is proper that the rich know and consider in their hearts, that their houses, which will last forever, will fall to heirs, and announce about them [that they were like animals; refer to 49:13:2:4].
What is the meaning of "Kar'u vi'Shmosam"?
Rashi: They called their houses like their own names, in order that they will have a remembrance, like "va'Yikra Shem ha'Ir k'Shem Bno Chanoch" (Bereishis 4:17). Antiyochas built Antuchiya, Salikus built Salikiya.
What does the end of the verse teach?
Radak #1: Their buildings are so big and fortified that they became famous.
Radak #2: After death, nothing remains for them from their dwellings, just they are called on their names - this was Ploni's house.
