Reneging on commitments can damage relationships and trust, as it shows unreliability. He reneged on his vow, losing the trust of his friends.
Pro Tip 2/3
Consequence Warning
Using 'renege' indicates possible negative consequences for not following through on a promise. If you renege on this agreement, there will be legal actions.
Pro Tip 3/3
Serious Matters
'Renege' is often used in serious contexts, like legal contracts or important personal promises. The company reneged on its commitment to environmental policies.