ninth
UK: naɪnθ | US: naɪnθ
adj. constituting number nine in a sequence; 9th
n. the position or item ranked ninth
The word "ninth" combines the cardinal number "nine" (from Old English "nigon," Proto-Germanic "*newun," ultimately from Proto-Indo-European "*h₁néwn̥") with the ordinal suffix "-th" (from Old English "-þa," used to form ordinal numbers). This suffix systematically transforms cardinal numbers (e.g., four → fourth, five → fifth) into their ordinal counterparts, maintaining a consistent linguistic pattern across English.
She finished in ninth place in the race.
The ninth chapter of the book explores advanced theories.
His birthday falls on the ninth of December.
This is the ninth time I’ve called you today.
The team secured their ninth consecutive victory.