Tip-of-the-tongue (TOT) experiences are frustrating word-finding failures where people are temporarily unable to produce a word they are certain they know. (Google)
Why is it that people often have tip-of-the-tongueexperiences where words suddenly go missing only to reappear later? (Google)
I'll have the right word on the tip of my tongue when I want to tell friends I've been right all along. (V … v … validated. That's it! Validated!) (Google)