Phonetic transliteration of English Faith (FAYTH).
费 fèi +
思 sī produce 'fay-s' approximately. As an actual translation of the religious noun 'faith', Chinese uses
信仰 xìnyǎng or
信念 xìnniàn —
费思 is reserved for the proper name. Best-known bearer in Chinese pop sources is country singer Faith Hill (
费思·
希尔).