Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
pressim, adv. [pressus], with pressing, by pressing to one’s self (post-class.): me pressim deosculato, App. M. 2, p. 121, 32: linteolo pressim agglutinato, i. e. closely pressed, id. ib. 2, p. 128, 23.