Structure
1 + Counter + たりとも + Phrase[ない](1)
(1) Verb[な]
Details
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Formal
About 1~たりとも~ない
たりとも is a grammar pattern that is most often used in negative sentences, in order to indicate that (A) is not an exception to something. It will follow either number words, or nouns. Possible translations include 'not even one (A)', and 'not a single (A)'.
However, due to たりとも just being a combination of the auxiliary verb たり 'presenting examples', and the conjunction particle とも 'presenting approximate limitations', the literal translation of たりとも is just 'even limited to (A) as an example, not (B)', with the 'not (B)' coming from the negative structure in the second half of the sentence.
This is a very formal expression, so will not be used in daily conversation.
Fun Fact
何人たりとも 'no matter who it is, no exceptions' is a set expression that may see more frequent use than any of the other たりとも structures.
- この洞窟へは20年前に起きた事故以来、何人たりとも立ち入ることが許されない。Since the accident that occurred 20 years ago, no one has been allowed to enter this cave.
Examples
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人間は酸素なしには1日たりとも生きられない。
Humans can not live even one day without oxygen.
安全や生命を脅かすものは何人たりとも許されない。
Not even one person is allowed to threaten life or security.
今日は沢山の仕事があるので、一分たりともぼーっとして過ごすわけにはいきません。
I have stacks of work to do today, so there’s no way I can zone out for even one minute.
小説:「一瞬たりとも無駄にしないつもりで生きている。」
Novel: 'He follows his belief of wasting not even one moment in his life.'
茜雫の死以来15年経ったが、彼女を忘れたことは一度たりともなかった。
Even though 15 years have passed since the death of Senna, I have not forgotten her even one time.
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