Acting or done with a lack of care or caution; careless or irresponsible.
Given to or characterized by neglect, especially habitual neglect:
Easily excited, upset, etc.
Not attentive; heedless; negligent
Marked by or exhibiting a lack of reliability.
Changeable or unstable in affection, interest, loyalty, etc.; capricious
Characterized by a lack of ambition or energy:
Lacking or exhibiting a lack of good sense or judgment; silly:
Lacking the emotional maturity, sense of responsibility, etc. characteristic of an adult, or of others one's own age
Not handling practical matters well
Seeing or disposed to see visions
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
The definition of harum-scarum is done in a reckless way.
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:
The definition of heedless is a person who is careless.
Worthy of trust; dependable; reliable
The definition of liable is being likely to do or experience something or to having legal responsibility for something.
The definition of reliable is dependable or capable of being trusted.
Acting or working in a thoughtful, painstaking way
Obliged to account for one's acts; responsible
Find another word for irresponsible. In this page you can discover 57 synonyms, antonyms, idiomatic expressions, and related words for irresponsible, like: reckless, undependable, negligent, unconcerned, trustworthy, flighty, feckless, liable, inattentive, thoughtless and unmindful.