Jeremiah 31:3: "I have loved you with an ___ love."

Answer: everlasting

"I have loved you with an everlasting love; therefore I have drawn you with loving devotion" (KJV: "lovingkindness").

“The LORD appeared to us in the past, saying: “I have loved you with an everlasting love; therefore I have drawn you with loving devotion.”— Jeremiah 31:3 (BSB)