The word "Astruthium" is spelled with the letters A-S-T-R-U-T-H-I-U-M. It is pronounced as [æsˈtruθɪəm]. The first two letters, "A" and "S," represent the sounds /æ/ and /s/, respectively. The following letters, "T," "R," "U," "T," "H," and "I," represent the sounds /t/, /r/, /ʌ/, /t/, /θ/, and /ɪ/, respectively. Finally, the last two letters, "U" and "M," represent the sounds /əm/. In summary, the spelling of Astruthium is phonetically transcribed as [æsˈtruθɪəm].