Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
indemnĭtas, ātis, f. [indemnis], security from damage or loss, indemnity (post-class.): alicujus indemnitati consulere, Dig. 3, 5, 31; 12, 4, 5: provinciarum indemnitati prospicere, Amm. 21, 16 al.