Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
pĭpĕrītis, is and ĭdis, f., = πεπερῖτις, pepperwort, prob. Indian pepper: piperitis, quam et siliquastrum appellavimus, Plin. 20, 17, 66, § 174; 19, 12, 62, § 187.