renege

"My commitment to finishing my school project is strong; I plan to stay late at the library to complete it. "

"I was going to go shopping, but I went dancing instead."

"He promised to never return to this town again."

"The heavy rain was leaving puddles all over the playground. "

"I went to the park because the weather was nice. "

"His renunciation of the scholarship was unexpected; he decided to work instead. "

"As everyone knew, he was capable of violence when roused."

"It is hard work to swim against the current."

"They played long and hard."

"if I make a promise, I always stick to it;  he broke his promise"

"a follow shot"

""Maria reneged on her promise to help me with my homework, so I had to finish it myself." "