Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
infēlīcĭto (or infēlīco, v. infra), āre, 1, v. a. [infelix], to render unhappy, make wretched, plague (ante-class.): di me et te infelicitent, Plaut. Cas. 2, 3, 30 (Ritschl et MSS.; al. infelicent): Hercle illum infelicitent di, id. Merc. 2, 3, 99 (Ritschl; al. infelicent): ut te di omnes infelicitent, Caecil. ap. Non. 126, 26 (but Com. Fragm. v. 114 Rib., infelicent).
Form infelico: di illum infelicent omnes, Plaut. Poen. 2, 1, 1.