stul·ti·fy 
/ˈstʌltəˌfaɪ/ verb
stul·ti·fies; stul·ti·fied; stul·ti·fy·ing /ˈstʌltəˌfaɪ/ verb [+ obj] formal : to cause (someone or something) to become dull, slow, etc.
▪ The government has been stultified by bureaucracy.
▪ The government has been stultified by bureaucracy.
— stultifying adjective [more stultifying; most stultifying]
▪ stultifying boredom
▪ stultifying boredom
