Indelible
/ˌɪˈndɛlɪbəl/
Listen pronunciation
Definition
(adj) Having the quality of being difficult to delete, remove, wash away, blot out, or efface.
Sentence Examples
Will you please use indelible ink so the phrase won't rub out?
Mr. Brown's unique style of teaching left an indelible mark on generations of students.
CEFR Practice Quiz
The experience of visiting the ancient ruins left an ____ impression on the young student.