■ inhuman 与 unhuman

inhuman 是“惨无人道”、“灭绝人性”。

• Nero was an inhuman emperor.尼罗是个残暴的皇帝。

unhuman 则没有道德上的贬义，只是指“不属于人类的”。

• The sounds issuing from the wounded man's throat were unhuman.伤者喉咙里发出的声音，简直不像人声。
• To make mistakes is human; not to make a mistake is unhuman.犯错误是人之常情；根本不犯错误却是不近人情了。