› An indelible mark or substance is impossible to remove by washing or in any other way:
indelible ink
› [ before noun ] Indelible memories or actions are impossible to forget, or have a permanent influence or effect:
In his 20 years working for the company, Joe Pearson made an indelible impression on it.
Thesaurus: synonyms and related words
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indelibly
adverb uk
/ɪnˈdel.ə.bli/ us
/ɪnˈdel.ə.bli/