Definition of unimpressionable in English:

unimpressionable

adjective

  • (of a person) not easily influenced.

    • ‘Anyway, Moore can be said to have attracted the attention of young, impressionable readers - and probably old, unimpressionable ones as well, as his works sell, literally, by the million.’
    • ‘All unimpressionable youths with enough life experience to be able to distinguish image and reality?’
    • ‘It was amazing how unimpressionable Alonzo was, just like the rest of them, another face, another lifeless personality.’
    • ‘They too would disappear one day to leave behind an unimpressionable clean sheet bookmarked in time by a few dry and crumpled old flowers.’
    • ‘A static camera stresses the rigidity of an unimpressed and unimpressionable Bob, ever present at the bar.’

Pronunciation:

unimpressionable

/ʌnɪmˈprɛʃ(ə)nəb(ə)l/