変へん則そく

noun, na-adjective, noun which may take the genitive case particle 'no'

irregularity; anomaly; irregular

Used when something does not follow the normal rule, pattern, schedule, or form. Often appears adjectivally in compounds such as 変則日程 and 変則勤務, and the derived form 変則的 is also common.

• 今年ことしの大たい会かいは変へん則そく日にっ程ていで行おこなわれる。

  This year's tournament will be held on an irregular schedule.

• かなり変へん則そくなルールだが、慣なれれば難むずかしくない。

  The rules are quite irregular, but they are not difficult once you get used to them.

• この活かつ用ようにはいくつか変へん則そくがある。

  There are several irregularities in this conjugation.