1.   Deep in the interstices of daily life, no doubt, frustrations gnawed at him and resentments festered.

2.   It was a messy divorce, and the resentment festers almost a year later.

3.   Resentments fester between those who stayed and languished in poverty and those who prospered abroad.

4.   They say resentment has been festering for years and young Mohajirs have turned to violence to demand their rights.