失效 (shī xiào): Lose effectiveness / become invalid (Verb) — Meaning & Stroke Order

This contract has officially become invalid since last month due to failure to perform on time.

Will the account protection mechanism temporarily become invalid if the password is entered incorrectly multiple times in a row?

Even though the medicine has lost its effectiveness, he still insists on taking it, which is completely useless.

Please use the coupon before the end of the month, otherwise it will automatically become invalid.