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English word irresponsible comes from English in-, English responsible
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in- (English)
In, into (non-productive) Added to adjectives to mean not. (non-productive) Added to nouns to mean lacking or without. (non-productive) Used with certain words to reverse their meaning In, into, towards, within.
responsible (English)
Able to be trusted; reliable; trustworthy.. Answerable for an act performed or for its consequences; accountable; amenable, especially legally or politically.. Being a primary cause or agent of some event or action; capable of being credited for something, or of being held liable for something.. Capable of responding to any reasonable claim; able to answer reasonably for one's conduct and [...]
irresponsible (English)
Lacking a sense of responsibility; incapable of or not chargeable with responsibility; unable to respond to obligation; negligent.. Not responsible; not subject to responsibility; not to be held accountable, or called into question. Someone who is not responsible.