indelible ink/pencil/marker etcMARKink etc that makes a permanent mark which cannot be removed 不褪色墨水/铅笔/记号笔等indelible ink/pencil/marker etc• All voters' hands will be dyed with indelible ink, and both the vote and the count will be conducted locally.
→ indelible ink/pencil/marker etc at indelible(1)