Explanation
Used to show a strong negative: 'not even ~', 'not a single ~'.
Formation
Noun + たりとも + Negative Verb
Detailed explanation
「Noun + たりとも + Negative Verb」expresses a strong negation such as 'not even one', 'not even once', or 'none at all'.
Examples
一分たりとも無駄にするな。
Ippun tari tomo muda ni suru na.
Don’t waste even a single minute.
彼は一言たりとも話さない。
Kare wa hitokoto tari tomo hanasanai.
He doesn't speak even a single word.
彼女は一度たりともその映画を見たことがない。
Kanojo wa ichido tari tomo sono eiga o mita koto ga nai.
She has never seen that movie, not even once.
私は一枚たりともその写真を持っていない。
Watashi wa ichimai tari tomo sono shashin o motte inai.
I don't have even a single picture of it.
Practice
Grammar content sourced from hanabira.org.