Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
contemptĭbĭlis (-temt-), e, adj. [contemno], contemptible (post-class.), Dig. 1, 16, 9; 21, 2, 37; Arn. 4, p. 155.
Comp., Lampr. Alex. Sev. 20.