Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
lĭbĭtīnārĭus, ii, m. [Libitina], an undertaker (post-Aug.): designatores et libitinarii, Sen. Ben. 6, 38; cf.: si libitinarius, quos Graece νεκροθάπτας vocant, etc., Dig. 14, 3, 5, § 8.