stringently
adverb
uk/ˈstrɪn.dʒənt.li/us/ˈstrɪn.dʒənt.li/in a way that isstrict,severe, orlimiting:
Fireregulationsare stringentlyenforcedin allourfactories.
Publicbehaviouris stringentlyregulatedandcitizensfeararrestforspeakingtheirminds.
See
stringent
- Thecitymustenforceany newcontrolsmore stringently.
 - Drugs are the most stringentlyregulatedcategoryofconsumergoods.
 - Districtsvaryin how stringently theycheckpotentialemployees'backgrounds.
 
Serious and severe
- acutely
 - acuteness
 - catastrophic
 - critical
 - critically
 - dire
 - egregious
 - fatal
 - grave
 - heaviness
 - non-fatal
 - non-serious
 - seriously
 - severe
 - severely
 - stiff
 - stringent
 - terminal
 - toughness
 - utmost