偶発ぐうはつ Common Noun Irregular Intransitive Noun English jmdict 1 noun (common) (futsuumeishi) noun or participle which takes the aux. verb suru intransitive verbnouns which may take the genitive case particle 'no' sudden outbreak;accidental;incidental
偶発的ぐうはつてき I-adj English jmdict 1 adjectival nouns or quasi-adjectives (keiyodoshi) accidental;incidental;occasional;casual 彼が不作法なのは意識的であって、偶発的ではなかった。 His rudeness was conscious, not accidental.