YOU SAID:

his palms are sweaty knees weak arms are heavy spaghetti on his sweater already

INTO JAPANESE

彼の手のひらは汗をかいた膝弱い腕はすでにセーターに重いスパゲッティ

BACK INTO ENGLISH

His palms are sweaty knees weak arms already sweater heavy spaghetti

INTO JAPANESE

彼の手のひらは汗をかいた膝弱い武器既にセーター重いスパゲッティ