listen to the pronunciation of stringent
Englisch - Englisch
Strict; binding strongly; making strict requirements; restrictive; rigid; severe

They have stringent quality requirements outlining what is acceptable.

{a} binding, contracting, forcing
{s} severe, strict, demanding; binding, constraining; characterized by a shortage of funds
Binding strongly; making strict requirements; restrictive; rigid; severe; as, stringent rules
demanding strict attention to rules and procedures; "rigorous discipline"; "tight security"; "stringent safety measures"
Stringent laws, rules, or conditions are very severe or are strictly controlled. He announced that there would be more stringent controls on the possession of weapons Its drug-testing procedures are the most stringent in the world. + stringently strin·gent·ly He is determined to see the Act enforced more stringently
stringent check
meticulous examination
in a stringent manner
in a stringent manner; "the laws are stringently enforced"; "stringently controlled"
in a stringent manner, severely, strictly, rigidly