What did Jezebel arrange to happen to Naboth?

Answer: Stoned on false charges

Jezebel had two scoundrels falsely accuse Naboth of cursing God and the king, and he was stoned to death.

“And the two scoundrels came in and sat opposite Naboth, and these men testified against him before the people, saying, “Naboth has cursed both God and the king!” So they took him outside the city and stoned him to death.”— 1 Kings 21:13 (BSB)