Synonyms: unwitting, unintentional, unplanned
Definition: not done with purpose or intent
Usage: an unintended slight; an unintentional pun; the offense was unintentional; an unwitting mistake may be overlooked
Similar words: unintended
Definition: not deliberate
Synonyms: unplanned
Definition: without apparent forethought or prompting or planning
Usage: an unplanned economy; accepts an unplanned order; an unplanned pregnancy; unplanned remarks
Definition: occurring or appearing or singled out by chance
Usage: seek help from casual passers-by; a casual meeting; a chance occurrence
Similar words: ad hoc
Definition: often improvised or impromptu
Usage: an ad hoc committee meeting
Similar words: casual
Definition: without or seeming to be without plan or method; offhand
Usage: a casual remark; information collected by casual methods and in their spare time
Similar words: unpremeditated
Definition: not prepared or planned in advance
Usage: asked an unpremeditated question