宦官 is read as かんがん (kangan) and means eunuch.
かんがん
kangan
しんかん
Shinto priest
ぞう
judge
じょかん
court lady
けいかん
police officer
きかん
organ
ふくかん
adjutant
さかん
plasterer
じえいかん
Japanese Self-Defense Force official
さいばんかん
かんぼうちょうかん
Chief Cabinet Secretary (Japan)
ちょうかん
secretary (government)
べんむかん
commissioner