Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
illĕcĕbrōsus (inl-), a, um, adj. [illecebra], full of allurement, very enticing, attractive, seductive (ante- and post-class.): istoc illecebrosius Fieri nihil potest, Plaut. Bacch. 1, 1, 54: sapor, Prud. adv. Symm. 2, 144: insidiae, Amm. 30, 1.
Adv.: illĕcĕ-brōsē, enticingly, attractively.
Comp.: agi, Amm. 30, 5, 7 (but not in Plaut. Mil. 3, 2, 36; v. Ritschl ad h. l.).