Webster's 1828 Dictionary
UNINTENTIONAL
a.Not intentional; not designed; done or happening without design.
UNINTENTIONALLY
adv. Without design or purpose.
New American Oxford Dictionary
unintentional
un in ten tion al |ˌəninˈtenCHənl ʌnɪnˈtenʃənl | ▶adjective not done on purpose: the translation added a layer of unintentional comedy. DERIVATIVES un in ten tion al ly adverb
Oxford Dictionary
unintentional
un |in ¦ten ¦tion ¦al |ʌnɪnˈtɛnʃ (ə )n (ə )l | ▶adjective not done on purpose: the translation added a layer of unintentional comedy. DERIVATIVES unintentionally adverb
American Oxford Thesaurus
unintentional
unintentional adjective I assure you, the insult was unintentional: unintended, accidental, inadvertent, involuntary, unwitting, unthinking, unpremeditated, unconscious; spontaneous; random, fortuitous, serendipitous, fluky. ANTONYMS deliberate. WORD TOOLKIT See spontaneous . Word Toolkits illustrate the difference between close synonyms by means of words typically used with them.
Oxford Thesaurus
unintentional
unintentional adjective I assure you, the insult was unintentional: unintended, accidental, inadvertent, involuntary, unwitting, unthinking, unmeant, unplanned, unpremeditated, unexpected, unforeseen, fortuitous, chance, coincidental, serendipitous, unconscious, subconscious. ANTONYMS intentional, deliberate. WORD TOOLKIT unintentional See spontaneous . Word Toolkits illustrate the difference between close synonyms by means of words typically used with them.
Sanseido Wisdom Dictionary
unintentional
ù n in t é n tion al 形容詞 故意でない ; ふとした .~ly 副詞