Definition from Wiktionary, the free dictionary
- That cannot be suppressed.
1903, William Godwin, Caleb Williams:
- It seemed as if the sense of public resentment had long been gathering strength unperceived, and now burst forth into insuppressible violence.
1921, Louis Joseph Vance, Red Masquerade:
- In its stead Victor favoured Karslake with a slow smile of understanding that broadened into an insuppressible grin of successful malice, a grimace of crude exultation through which peered out the impish savage mutinously imprisoned within a flimsy husk of modern manner.