Bella Thorne (as a proper name) refers to the actress and musician whose name is often spoken as two distinct names: /ˈbɛl.ə/ and /θɔːrn/ in General American or /ˈbɛl.ə/ and /ˈθɔːn/ in some UK pronunciations. The pronunciation emphasizes two stressed syllables in the full name, with the surname starting with a voiceless dental fricative and ending with a rhotic or non-rhotic vowel depending on the accent. It functions as a personal name rather than a common verb, though your prompt labels it as a verb in error; in practice, it is pronounced as a proper noun when naming the person Bella Thorne.
Full pronunciation guide
