JMdict: 2018190

や否や 【やいなや】

  1. [exp] the minute (that) ...; no sooner than ...; as soon as
  2. [exp] whether or not
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Kanji in this word:

Kanji Meanings On Readings Kun Readings Grade
否 Negate, No, Noes, Refuse, Decline, Deny ヒ いな, いや 6