たりとも〜ない
tari tomo ~nai
not even one; not the slightest
[Not even one / Not the slightest]
Connection: 一 + Counter + たりとも〜ない
Usage: Emphasizes that not even the smallest amount is allowed, possible, or tolerable. Always used with 一 (one) + a counter and a negative predicate. Very strong emphasis.
Examples:
一秒たりとも無駄にしたくない。(I don't want to waste even a single second.)
一円たりとも貸すつもりはない。(I have no intention of lending even a single yen.)
一歩たりとも動くな。(Don't move even a single step.)