What is the meaning of "Chalku"?
Rashi: This is like "Chalaklakos" (35:6. Rashi there - slippery).
Malbim: David sensed a bit of the rebellion, that there are complaints among the nation. He took counsel with Achitofel, who told him not to heed this or do anything, just to trust in Hashem (verse 23).
What are "Machama'os"?
Rashi: It is an expression of Chem'ah (butter). The first Mem is from the root; sometimes it is omitted 1 , like the Mem in Ma'aseh and in Ma'amar.
Radak: The first Mem is a prefix. The words of his mouth are smoother than butter, but his heart was not with me.
Radak: The letters Aleph, Mem, Tov, Yud and Nun are sometimes added [at the beginning].
What is the meaning of "u'Kerav Libo"?
Rashi: His heart is for war.
What is the meaning of "v'Hemah Pesichos"?
Rashi citing Menachem: It is an expression of Charavos (swords), like "Eretz Nimrod bi'Fsacheha" (Michah 5:5).
Rashi: It is an expression of a curse in Arame'ic; Pesicha is a document of excommunication.
Malbim: It is something open and revealed to everyone, that Achitofel prepared a trap for me. I relied on his words (not to worry about rebellion) and did not investigate, and via this, all his matters and the rebellion were hidden from me.
Why does it say "Raku Devarav"?
Radak: The matter is repeated in different words.
