一いち度ど

noun, adverb

once; one time; on one occasion

The common reading いちど means one occurrence or one try. The reading ひとたび is more formal or literary and often means 'once' in the sense of 'once something happens'.

• 一いち度どだけ彼かれに会あったことがある。

  I have met him only once.

• ひとたび始はじめたら、最さい後ごまでやる。

  Once I start, I see it through to the end.

noun, adverb

temporarily; for a time; for a moment

Only with reading ひとたび

Restricted to the reading ひとたび. This is an uncommon, somewhat literary adverbial use meaning that a state holds only briefly or for a limited time.

• 戦せん火かはひとたび収おさまったが、翌よく年ねんまた広ひろがった。

  The fighting subsided for a time, but spread again the following year.

noun, adverb

one degree; one tone; one musical interval

Only with reading いちど

Restricted to the reading いちど. Used for one degree in measurements such as temperature or angles; in music, it can refer to a first-degree or unison-type interval.

• 気き温おんが昨日きのうより一いち度ど下さがった。

  The temperature fell by one degree compared with yesterday.

• 同おなじ高たかさの二ふたつの音おとは、一いち度どの音おん程ていと呼よばれる。

  Two notes of the same pitch are called a unison interval.