Apāṭuka (adj.) [a + pātu + ka (?), acc. to Morris J.P.T.S. 1893, 7 der. fr. apaṭu not sharp, blunt, uncouth. This is hardly correct. See pātur] not open, sly, insidious Th 1, 940 (as v. l. for T. avāṭuka, trsl. by Mrs. Rh. D. as "unscrupulous", by Neumann as "ohne Redlichkeit"). Context suggests a meaning similar to the preceding nekatika, i. e. fraudulent. See also next.

Pali-English Dictionary, TW Rhys Davids, William Stede,