Wiktionary
wear thin
vb. (context idiomatic English) To lessen or weaken over time, as from overuse.
WordNet
Usage examples of "wear thin".
Probably this seclusion would wear thin if it stretched out for a week, but she would like to have that week.
Her constant ploys to mislead Serilla were vexatious, and making her own deception wear thin.
They felt chilly, and she thought it made no sense to wear thin synthetics here and heat the buildings to a temperature that made them practical.
He was required to repeat his story twice for lower-level constables, then for Captain Fenris himself, then, just as his temper was beginning to wear thin, two new humans were ushered into a room that was beginning to seem far too small.