szívósan w języku angielskim

hard▼◼◼◼adverb
[UK: hɑːd] [US: ˈhɑːrd]

tenaciously▼◼◼◻adverb
[UK: tɪ.ˈneɪ.ʃə.sli] [US: tə.ˈneɪ.ʃə.sli]

stoutly▼adverb
[UK: ˈstaʊt.li] [US: ˈstaʊt.li]