合がっ併ぺい号ごう

noun

double issue; combined issue

Used for magazines, journals, or other periodicals that combine two or more regular issues into one, often for consecutive months or special editions.

• この雑ざっ誌しの1月がつ号ごうと2月がつ号ごうは合がっ併ぺい号ごうです。

  The January and February issues of this magazine are a combined issue.

• 年ねん末まつ年ねん始しは合がっ併ぺい号ごうになることが多おおい。

  It's common to have a double issue around the New Year holiday.