What word, meaning "a gift devoted to God," did Jesus cite when rebuking the Pharisees in Mark 7?

Answer: Corban

Jesus said that by calling what their parents would receive "Corban," people avoided helping them, nullifying God's word by tradition.

“But you say that if a man says to his father or mother, ‘Whatever you would have received from me is Corban’ (that is, a gift devoted to God),”— Mark 7:11 (BSB)