ənˈdeləbəl, (ˈ)in|d-, (ˈ)in|deləbəl adjective
Etymology: Medieval Latin indelibilis, alteration (influenced by Latin -ibilis -ible) of Latin indelebilis, from in- in- (I) + delebilis delible
1. : that cannot be removed, washed away, or erased
an indelible stain
an indelible mark
: that cannot be effaced or obliterated : permanent , lasting
made an indelible impression on his mind
2. : that makes marks that cannot easily be removed (as by erasing)
an indelible pencil
specifically : not attacked by strong acids or alkalies and so not easily removed by washing
india ink is indelible
bought some indelible ink
• in·del·i·bly -blē, -li adverb