不定期
Describes something that does not happen at fixed intervals or according to a set schedule. It is commonly used to indicate that events, publications, or services occur randomly or whenever necessary rather than on a routine basis.
Exemplos
3 de 5この雑誌は不定期に発行されています。
This magazine is published irregularly.
不定期なメンテナンスのため、サービスを停止いたします。
Service will be suspended due to irregular maintenance.
あのカフェ、不定期で休みだから気をつけて。
That cafe closes irregularly, so be careful.
Família de palavras
Dica de memorização
Break it down: 不 (Fu - Not) + 定期 (Teiki - Fixed period/Regular). If you know 'Teikiken' (a commuter pass for a fixed period), this is just the 'not' version of that schedule.
Quiz rápido
このイベントは（ ）に開催されるので、スケジュールが決まっていません。
Correto!
A resposta correta é: 不定期
Exemplos
この雑誌は不定期に発行されています。
everydayThis magazine is published irregularly.
不定期なメンテナンスのため、サービスを停止いたします。
formalService will be suspended due to irregular maintenance.
あのカフェ、不定期で休みだから気をつけて。
informalThat cafe closes irregularly, so be careful.
不定期な脈拍の変動がグラフに示されている。
academicIrregular fluctuations in the pulse are shown on the graph.
弊社では不定期の社内会議を行っております。
businessOur company holds internal meetings on an irregular basis.
Família de palavras
Colocações comuns
Frases Comuns
不定期での発行
publishing on an irregular basis
不定期な休み
unscheduled holidays
不定期船
tramp steamer / irregular ship
Frequentemente confundido com
Rinji means 'temporary' or 'special/extraordinary' for a specific occasion, while futeiki refers specifically to the lack of a recurring schedule.
Tamani is an adverb meaning 'occasionally' (low frequency), whereas futeiki focuses on the absence of a fixed pattern.
Notas de uso
It is often used as a 'na-adjective' (futeiki-na) or with the particle 'ni' to function as an adverb. In business, it often appears in compound nouns like 'futeiki-kaisa' (irregularly held).
Erros comuns
Learners sometimes use this word to mean 'rarely,' but it actually means 'not at a fixed time.' Something can happen frequently but still be 'futeiki' if the timing isn't predictable.
Dica de memorização
Break it down: 不 (Fu - Not) + 定期 (Teiki - Fixed period/Regular). If you know 'Teikiken' (a commuter pass for a fixed period), this is just the 'not' version of that schedule.
Origem da palavra
Composed of the Sinitic roots 'Bu' (negation), 'Tei' (fix/settle), and 'Ki' (period/time).
Padrões gramaticais
Contexto cultural
In Japan, many small, independent shops or family-owned restaurants list their holidays as 'futeiki-kyubi,' meaning they close whenever they need to rather than on a set day like every Monday.
Quiz rápido
このイベントは（ ）に開催されるので、スケジュールが決まっていません。
Correto!
A resposta correta é: 不定期
Vocabulário relacionado
Palavras relacionadas
抗争
A1A serious struggle or conflict between opposing groups, factions, or organizations. It often implies a prolonged period of resistance, power struggles, or violent feuding.
平和
A1A state of harmony and the absence of conflict, war, or disturbance. It is used to describe both global stability between nations and a quiet, tranquil personal lifestyle or environment.
和平
A1和平 (wahei) refers to a state of peace or the restoration of peace, specifically in a diplomatic or formal context between conflicting parties. Unlike the more general word for peace (平和), it often implies the process of ending a war or dispute through negotiation.
休戦
A1A temporary cessation of fighting or conflict by mutual agreement; a truce or armistice. It indicates a period where parties agree to stop hostile actions, whether in a literal war or a metaphorical argument.
停戦
A1A temporary cessation of fighting or a ceasefire agreement between opposing forces in a conflict. It is used when parties agree to stop hostilities to allow for negotiations, humanitarian aid, or the permanent end of a war.
組織
A1Soshiki refers to a structured group of people working together for a specific purpose, such as a company, institution, or system. It can also refer to biological tissue in a medical or scientific context, describing how cells are arranged.
協会
A1An organized group of people who have the same interest, job, or purpose. It is commonly used for professional bodies, sports leagues, or non-profit organizations that represent a collective interest.
学会
A1An academic society or a professional organization where scholars and researchers share their findings. It also commonly refers to the specific academic conferences or meetings organized by these groups.
法人
A1A legal entity or organization, such as a company or non-profit, that is recognized by law as having rights and duties similar to those of a person. It distinguishes a group or institution from an individual human being in legal and business matters.
組合
A1A formal organization or association formed by individuals or groups with a common interest, most commonly referring to a labor union or a cooperative. It describes a collective body where members work together to achieve shared social, economic, or professional goals.
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