D defs.my
Entry 2 senses Webster, 1913

Irresponsible

/ĭrˌ-əs-pän'-səb-əl/ · Ir·re·spon·si·ble · IPA /ˌɪɹ.əˈspɑn.sə.bəl/
01 a. Not responsible; not liable or able to answer for consequences; innocent.
  1. 1.
    Not responsible; not liable or able to answer for consequences; innocent.
  2. 2.
    Not to be trusted; unreliable; lacking a proper sense of responsibility.