'Encourage' in the Bible

Joshua the son of Nun, who stands before you, he shall go in there: encourage you him; for he shall cause Israel to inherit it.

But commission Joshua, and encourage him, and strengthen him; for he shall go over before this people, and he shall cause them to inherit the land which you shall see."

Then David said to the messenger, "Thus you shall tell Joab, 'Don't let this thing displease you, for the sword devours one as well as another. Make your battle stronger against the city, and overthrow it.' Encourage him."

They encourage themselves in evil plans. They talk about laying snares secretly. They say, "Who will see them?"