Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
1. lŭto, āvi, ātum, 1, v. a. [2. lutum], to bedaub with mud or clay.
* 2. lūto, āvi, ātum, v. freq. a. [for luito, from luo; cf. Paul. ex Fest. p. 116, 5 Müll.: litatum … quasi luitatum], to pay: lutavi, Varr. ap. Non. 131, 21.