irresponsible

 
Pronunciation: /ɪrɪˈspɒnsɪb(ə)l/

adjective

  • (of a person, attitude, or action) not showing a proper sense of responsibility: [with infinitive]: it would have been irresponsible just to drive on

Derivatives

irresponsibility

Pronunciation: /-ˈbɪlɪti/
noun

irresponsibly

adverb