a pen with a writing point made of felt that makes marks that cannot be removed by washing

Pulling a permanent marker from his pocket, he signed autographs. 他从口袋里掏出一个永久性记号笔，在手稿上签了名。

Ensure you search every child's clothing for permanent markers with the caps off. 我保证你在每个孩子的衣服里都能够找到找没有笔帽的永久性记号笔。

ink from, or marks made with, a permanent marker

The words on the sign were written in permanent marker. 牌子上的字是用永久性记号笔写的。

Citrus can be used to remove pen marks — even permanent marker — from hard surfaces. 柑橘可以用来去除硬质表面的笔迹，甚至是永久性记号笔留下的印迹。