不定期(ふていき)

ふていき
na-adjective / noun
irregular, at random intervals
1. irregular, at random intervals, unscheduled
Describes something that does not follow a fixed or regular schedule. Used for events, publications, services, and other activities that occur at unpredictable or varying intervals.
不定期(ふていき)に更新(こうしん)しています。
I update at irregular intervals.
このバスは不定期(ふていき)運行(うんこう)なので、時刻表(じこくひょう)がない。
This bus runs on an irregular schedule, so there is no timetable.
不定期(ふていき)ながら季刊(きかん)誌(し)を発行(はっこう)していたが、最近(さいきん)は休刊(きゅうかん)している。
They had been publishing a quarterly magazine at irregular intervals, but it has been on hiatus recently.

USAGE: 不定期(ふていき) modifies nouns with な or に to form an adverb.

COMMON COLLOCATIONS:

  • 不定期(ふていき)に更新(こうしん)する (to update irregularly)
  • 不定期(ふていき)運行(うんこう) (irregular service)
  • 不定期(ふていき)連載(れんさい) (irregularly serialized)
  • 不定期(ふていき)開催(かいさい) (held at irregular intervals)

PAIR: The opposite is 定期(ていき) (regular, periodic). For example: 定期(ていき)便(びん) (regular service/flight) vs. 不定期(ふていき)便(びん) (charter/irregular service).

general
Added 2026.2.16 11:03
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