Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
pressŭlus, a, um, adj. dim. [pressus], somewhat pressed in or compressed (postclass.): ampulla pressula rotunditate, App. Flor. p. 346, 26.
Hence, adv.: pressŭlē, while pressing on, against, or to one’s self (post-class.): filium pressule saviata, App. M. 4, p. 156, 38: lacinia adhaerens pressule, closely, id. ib. 10, p. 254, 10.