Insistence implies a strong, non-negotiable demand, often with emotion or urgency. Her insistence on an apology made him realize the gravity of the situation.
Pro Tip 2/3
Social Pressure
Often suggests someone is using social or moral pressure to influence others. His insistence swayed the committee to approve the funds.
Pro Tip 3/3
Potential Annoyance
Excessive insistence can seem pushy or annoying in casual situations. Her constant insistence to participate became irritating.