aimless β A person or activity that is aimless has no clear purpose or plan.
arbitrary β If you describe an action, rule, or decision as arbitrary, you think that it is not based on any principle, plan, or system. It often seems unfair because of this.
careless β If you are careless, you do not pay enough attention to what you are doing, and so you make mistakes, or cause harm or damage.
casual β If you are casual, you are, or you pretend to be, relaxed and not very concerned about what is happening or what you are doing.
desultory β Something that is desultory is done in an unplanned and disorganized way, and without enthusiasm.
disorganized β functioning without adequate order, systemization, or planning; uncoordinated: a woefully disorganized enterprise.
helter-skelter β in headlong and disorderly haste: The children ran helter-skelter all over the house.
indiscriminate β not discriminating; lacking in care, judgment, selectivity, etc.: indiscriminate in one's friendships.
offhand β cavalierly, curtly, or brusquely: to reply offhand.
random β proceeding, made, or occurring without definite aim, reason, or pattern: the random selection of numbers.
slapdash β in a hasty, haphazard manner: He assembled the motor slapdash.
uncoordinated β of the same order or degree; equal in rank or importance.
accidental β An accidental event happens by chance or as the result of an accident, and is not deliberately intended.
chance β If there is a chance of something happening, it is possible that it will happen.
devil-may-care β If you say that someone has a devil-may-care attitude, you mean that they seem relaxed and do not seem worried about the consequences of their actions.
disorderly β characterized by disorder; irregular; untidy; confused: a disorderly desk.
fluke β Unlikely chance occurrence, especially a surprising piece of luck.
hit-or-miss β careless; inattentive; haphazard: The professor criticized the hit-or-miss quality of our research.
incidental β happening or likely to happen in an unplanned or subordinate conjunction with something else.
irregular β without symmetry, even shape, formal arrangement, etc.: an irregular pattern.
loose β free or released from fastening or attachment: a loose end.
purposeless β having no purpose or apparent meaning.
reckless β utterly unconcerned about the consequences of some action; without caution; careless (usually followed by of): to be reckless of danger.
slipshod β careless, untidy, or slovenly: slipshod work.
spontaneous β coming or resulting from a natural impulse or tendency; without effort or premeditation; natural and unconstrained; unplanned: a spontaneous burst of applause.
sudden β happening, coming, made, or done quickly, without warning, or unexpectedly: a sudden attack.
unconcerned β not involved or interested; disinterested.
unconscious β not conscious; without awareness, sensation, or cognition.
unconsidered β thought about or decided upon with care: a considered opinion.
unexpected β not expected; unforeseen; surprising: an unexpected pleasure; an unexpected development.
methodic β performed, disposed, or acting in a systematic way; systematic; orderly: a methodical person.
unorganized β not organized; without organic structure.
unpremeditated β done deliberately; planned in advance: a premeditated murder.
unsystematic β having, showing, or involving a system, method, or plan: a systematic course of reading; systematic efforts.
unthinking β thoughtless; heedless; inconsiderate: an unthinking, tactless person.
willy-nilly β in a disorganized or unplanned manner; sloppily.
chaotic β Something that is chaotic is in a state of complete disorder and confusion.
haphazard β characterized by lack of order or planning, by irregularity, or by randomness; determined by or dependent on chance; aimless.
unplanned β a scheme or method of acting, doing, proceeding, making, etc., developed in advance: battle plans.
wholesale β the sale of goods in quantity, as to retailers or jobbers, for resale (opposed to retail).
assorted β A group of assorted things is a group of similar things that are of different sizes or colours or have different qualities.