indelible
US
UK indelible adj: (impossible to erase)
SC 无法擦除的 wú fǎ cā chú de
Be careful with the permanent marker; the ink is indelible.
indelible adj: figurative (permanent) (比喻)
SC 永久的，永恒的 yǒng jiǔ de ，yǒng héng de
Unfortunately, some of the worst memories are indelible.