- undesigned, unintentional - not done or made or performed with purpose or intent
- unintentional, unwilled - without deliberate intent; "my heart with unwilled love grew warm"- George Macdonald
Antonym: willing (indirect, via unwilling)
- unintentional, unplanned, unwitting - not intentional; "an unintended slight"; "an unintentional pun"; "the offense was unintentional"; "an unwitting mistake may be overlooked"
Antonym: intended (indirect, via unintended)