Indelible

[ in-del-uh-buh l ]

adjective

1. making marks that cannot be removed
2. not able to be forgotten or removed

Examples of indelible in a sentence:

• When you endorse your check, be sure to use permanent ink so that your signature will be indelible and unalterable.
• After the kindness he has shown to our family during this difficult time, he will always have an indelible place in all our hearts.