Bailly
ἀ·κατάληπτος, ος, ον :
1 non pris, non touché, ARSTT.
Probl. 19, 42 ; 2 imprenable, JOS.
B.J. 3, 7, 7 ; 3 fig. incompréhensible, CIC.
Acad. 2, 9, 18 ; PLUT.
M. 1056 f,
etc.
Étym. ἀ, καταλαμϐάνω.
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LSJ
ον, that cannot be reached or touched, Arist. Pr. 921b23; τί ἐστι φίλος; ἄνθρωπος ἀ. Secund. Sent. 11. Adv. -τως Sch. Il. 17.75.
not to be conquered, J. BJ 3.7.7; defying suppression, τὸ ἀ. τῆς γοητείας Vett.Val. 238.25.
Philos., incomprehensible, Phld. Acad. Ind. p. 91 M., M.Ant 7.54, S.E. M. 7.432; that cannot be grasped, πλῆθος, of the stars, Chrysipp. Stoic. 2.168.
not comprehending or attaining conviction, φαντασία (opp. καταληπτική) Chrysipp. Stoic. 2.40, al. ; c. gen., ἀ. τῶν ὁμοειδῶν Phld. Herc. 1457.12. Adv. -τως, ἔχειν περί τινος Ph. 1.78; prob. l. in Arr. Epict. 2.23.46; — hence ἀκαταληψία, ἡ, inability to comprehend or attain conviction, Sceptic term, attrib. to Stoics by Galen, Stoic. 1.17, but to Arcesilaus by Cic. Att. 13.19.3, Numen. ap. Eus. PE 14.7, S.E. P. 1.1.
Liddell-Scott-Jones, Greek-English Lexicon (9th ed., 1940)
Pape
1) nicht einzunehmen, Jos.
2) nicht ergriffen, Arist. Probl. 19.42 ; gew. unbegreiflich, von den Skeptikern bes. gebrauchtes Wort, Cic. Acad. II.9.18 ; Plut. de stoic. rep. g. E.
Pape, Griechisch-deutsches Handwörterbuch (3. Aufl., 1914)