Part of speech:
Acting or done with a lack of care or caution; careless or irresponsible.
Easily excited, upset, etc.
Given to or characterized by neglect, especially habitual neglect:
Worthy of trust; dependable; reliable
Marked by or exhibiting a lack of reliability.
The definition of reliable is dependable or capable of being trusted.
Not handling practical matters well
Changeable or unstable in affection, interest, loyalty, etc.; capricious
Too hasty or incautious in acting or speaking; reckless
Not constant; fluctuating:
Lacking a sense of restraint or responsibility; idle:
The definition of lax is being relaxed or not strict.
Exposed to the wind and sea; unsheltered.
Jovial and rakish in manner.
Free from troubles or worry
Lacking or exhibiting a lack of good sense or judgment; silly:
The definition of harum-scarum is done in a reckless way.
Lacking the emotional maturity, sense of responsibility, etc. characteristic of an adult, or of others one's own age
Acting or done quickly with little or inadequate thought.
Marked by a lack of accord with reason or sound judgment:
Exhibiting a lack of thought:
Acting or working in a thoughtful, painstaking way
Obliged to account for one's acts; responsible
The definition of liable is being likely to do or experience something or to having legal responsibility for something.
The definition of heedless is a person who is careless.
Not attentive; heedless; negligent
Characterized by a lack of ambition or energy:
Seeing or disposed to see visions
Find another word for irresponsible. In this page you can discover 57 synonyms, antonyms, idiomatic expressions, and related words for irresponsible, like: reckless, flighty, undependable, negligent, trustworthy, feckless, unreliable, dependable, changeable, reliable and unconcerned.