偶然 meaning in English — accident, accidental, accidentally

English meaning

accident noun An unplanned event, often unfortunate, that happens without anyone intending it.
accidental adj Happening by chance rather than on purpose.
accidentally adv By chance or mistake, without intending to.
casual adj Relaxed and informal, especially in style, manner, or dress.
coincidence noun A remarkable occurrence of two or more events happening at the same time by chance, without any real connection.
contingency noun An event or circumstance that might happen but is not certain; a possible future situation planned for in advance.
contingent adj Dependent on something else that is uncertain; conditional.
fortuitous adj Happening by chance, especially in a lucky or fortunate way.
fortuity noun The state of being fortuitous.
incidental adjective Happening as a minor accompaniment to something else, rather than as the main point.
incidentally adverb Used to introduce a side remark, loosely connected to what was just said.
occasional adj Happening from time to time, but not regularly or often.

偶然 is used for these senses in English:

accident (uncountable) Chance; random chance.
accidental Happening by chance, or unexpectedly; taking place not according to the usual course of things; by accident, unintentional. [from 16th c.]
accidentally In an accidental manner; by chance, unexpectedly.
by chance Unexpectedly, accidentally; without foreplanning.
coincidence Of events, the appearance of a meaningful connection when there is none.
contingent Possible or liable, but not certain, to occur.
fortuity (uncountable) The state of being fortuitous.
incidental Existing tangentially, being a byproduct, a tangent, or a likely consequence.

noun An unplanned event, often unfortunate, that happens without anyone intending it.
noun A crash involving a vehicle or other form of transport.

事故アクシデント臨時記号誤って無意識的非正規雇用思い掛けないカジュアル普段楽日用一致