Rashi: Yedaber is present tense.

Rashi: He gathers evil thoughts, e.g. "Asah Li Es ha'Chayil ha'Zeh" (Devarim 8:17).

Radak: He speaks foully, and thinks in his heart how to do evil, until he does so.

Malbim: He openly speaks obscenity without any shame, and completes the deed also in his heart. His evil expands to encompass three matters on which human perfection depends - Emunos, Bein Adam la'Makom and Bein Adam l'Chavero. Refer to 32:6:3:2, 32:6:4:2, 32:6:5:1.

Rashi: He plans how to do flattery [Radak - until he flatters in the end].

Malbim: These are deeds in order to get haughty, or for another benefit not l'Shem Shamayim.

Radak: Because he says that Hashem does not oversee people, he steals when he can, for he says that there is no judgment; Hashem does not see the land. He fears only people.

Malbim: He speaks false and deceiving beliefs.

Radak: Aniyim, who are hungry, usually have no helpers. The Naval empties their Nefesh, i.e. he steals their food. It is as if he empties their Nefesh and takes it out. Similarly, he steals their drinks and causes them to lack.

Rashi: He steals from the poor.

Rashi citing Targum Yonasan: Divrei Torah, which are like water for the thirsty, he considers them worthless.

Radak: Refer to 32:6:5:1.