indelible

This term describes a state of permanence that resists all attempts at erasure. In a physical sense, it refers to substances like ink or dyes that bond so strongly to a surface that they cannot be washed or scrubbed away. When applied to memories or experiences, it suggests a psychological imprint so deep that it becomes a permanent part of a person's identity or history. It carries a weight of inevitability, often associated with profound trauma or monumental achievements that cannot be undone or forgotten.