Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
quattŭordĕcim (quat-), num. adj. [quattuor-decem], fourteen: partes, Plin. 2, 14, 11, § 58: sedere in quattuordecim (sc. ordinibus), to sit on the fourteen equestrian seats in the theatre, i. e. to be a knight, Suet. Caes. 39; Asin. ap. Cic. Fam. 10, 32, 2; Sen. Ep. 44.