Mr and Mrs Edet, a doctor and nurse from Perivale, also confiscated his passport, the court heard. They have denied slavery and cruelty charges, reported the BBC on Wednesday.
The jury heard in 1989 Inuk, then aged about 14, left Nigeria with the couple after a friend introduced them.
He had been promised he would be paid for his work for them and would receive an education, the court was told.
Instead, he was forced to clean, sleep on the floor and provide childcare, and told that if he tried to run away he would be arrested as an illegal immigrant, the prosecution said.
Prosecutor Roger Smart told court the couple had “deprived the complainant of his identity, his rights to education and freedom of movement and the money he should have received”.
Smart said: “The victim has described as having spent 24 years of his life and having nothing to show for it - his mother has died, he has no means of returning to Nigeria.
“He was entirely dependent on them and they deprived him of his adolescence, his education and his family life. They have treated him beneath contempt.”
The young man used to eat by himself, and the couple changed Inuk's name so he had the same surname as them, Smart said.
Smart said this was not the young man’s “choice nor his desire” but allowed Edet to “move him not only domestically but internationally at their convenience and whim”.
Edet, 60, was a trained obstetrician and gynaecologist and his wife Antan, 58, was a senior sister at a hospital.
Each have pleaded not guilty to holding a person in slavery and servitude and assisting unlawful immigration.
They also denied a further count of cruelty to a person under the age of 16.
Smart told the jury Inuk became so dependent on the couple he had no choice but to stay with them.
The trial continues.
Tags
Society