A eunuch is a man who has been castrated, meaning his testicles have been surgically removed. The word comes from the Greek “eunoukhos,” which literally translates to “bed guardian,” from “eune” (bed) and “ekhein” (to hold or keep). That original meaning reflects the role eunuchs most commonly filled in the ancient world: guarding royal harems and bedchambers, where their inability to father children made them trusted servants around royal women.
The term first appeared in English in the late 1300s, borrowed from Latin, which had borrowed it from Greek. While the literal definition is simple, the history and cultural significance behind it spans thousands of years across multiple civilizations.
Why Eunuchs Existed
Castration of men was practiced across the ancient and medieval world for remarkably practical, if brutal, reasons. Kings and emperors needed servants they could trust around their wives and concubines. A castrated man posed no risk of fathering illegitimate heirs or seducing royal women. But the role quickly expanded far beyond harem security. Because eunuchs could not have families of their own, rulers considered them uniquely loyal, unlikely to build rival dynasties or be “corrupted” by family ambitions. This made them ideal candidates for positions of enormous political power.
In the Ottoman Empire, eunuchs were so essential to the imperial household that the system could not function without them. The Chief Eunuch of the Ottoman harem wielded influence that stretched from guardianship of the Prophet’s tomb in Medina to oversight of grain trade along the Danube. In China’s Ming dynasty, eunuchs became so politically powerful that they formed what historians describe as a third branch of government alongside the scholar-bureaucrats and military commanders. They led military expeditions, shaped foreign policy, and oversaw the design and construction of the Forbidden City in Beijing.
Physical Effects of Castration
The physical consequences depended heavily on whether castration happened before or after puberty. When performed on boys before puberty, the absence of testosterone dramatically altered development. Without the hormone that drives male secondary sex characteristics, these boys never developed deep voices, facial hair, or the typical male pattern of muscle and fat distribution. Their bones continued growing longer than usual because testosterone is what signals growth plates to close. This often resulted in unusually tall, long-limbed body proportions.
Men castrated before puberty also never experienced male pattern baldness. A 1960 study monitored 21 young men for 18 years after castration and found that those with no hair loss at the time of the procedure kept their full head of hair indefinitely. Those who already had slight frontal hair loss saw no further progression. Baldness requires androgens (male hormones) to trigger the miniaturization of hair follicles, so removing the source of those hormones stops the process entirely.
One of the most striking findings involves lifespan. Researchers studying genealogical records from Korea’s Chosun dynasty found that eunuchs lived 14 to 19 years longer than other men of similar social standing. Among the 81 eunuchs studied, three lived past 100, a rate at least 130 times higher than in modern developed countries. This longevity gap couldn’t be explained by comfortable palace living, since other men in the court didn’t share the same advantage. Animal studies have since confirmed that prepubertal castration shifts growth and aging patterns toward the female trajectory, which in most species is the longer-lived one.
Eunuchs in Religious Texts
The Bible uses the word “eunuch” in both literal and figurative ways. In the Gospel of Matthew (19:12), Jesus describes three types: those born without sexual ability or desire, those castrated by other people, and those who choose celibacy “for the kingdom of heaven’s sake.” The first category likely referred to men born with physical conditions affecting sexual function or those whose desires were incompatible with marriage. The second described the literal eunuchs common in Eastern royal courts. The third was figurative, referring to people who voluntarily set aside marriage and sexual relationships to devote themselves fully to religious service.
This passage has been interpreted for centuries as a justification for religious celibacy, and it broadened the meaning of “eunuch” beyond its purely physical definition. In early Christianity, the verse influenced the development of monastic traditions and priestly celibacy, with the metaphorical eunuch becoming a model of spiritual devotion.
The Hijra Community in South Asia
In South Asia, a community with deep connections to the concept of eunuchs has existed for centuries. The Hijra are people assigned male at birth who identify as a third gender, neither fully male nor female. Some undergo castration as part of their identity, while others do not. Hijras have traditionally held ritual roles at births and marriages, where they are believed to have the power to bless families with prosperity.
Despite this cultural significance, Hijras have faced severe discrimination. They are almost always excluded from employment and education outside their ritual duties, and most live in poverty. Legal recognition has slowly improved: by 2014, India, Nepal, and Bangladesh had all officially recognized third gender citizens as deserving equal rights. India’s Supreme Court declared that gender self-identification “is not a social or medical issue, but a human rights issue.” In 2015, India elected its first Hijra mayor in the city of Raigarh, and in 2017, the city of Kochi hired 23 Hijra workers for its public transit system. Still, daily discrimination remains widespread.
The Term in Modern Context
Today, surgical removal of the testicles still occurs, but strictly for medical reasons. It is the standard treatment for testicular cancer and is sometimes performed to reduce testosterone in advanced prostate cancer. The medical term is orchiectomy rather than castration, and the context is entirely different from the historical practice, though the physiological outcome (reduced or absent testosterone production) is the same. Side effects can include weight gain, changes in cholesterol levels, and the need for ongoing hormone therapy.
The word “eunuch” itself is now largely historical. When people use it today, they are almost always referring to the ancient and medieval practice or to cultural groups like the Hijra. Its meaning has expanded well beyond the Greek original, carrying layers of political history, religious symbolism, and ongoing questions about gender identity that have accumulated over more than two thousand years.