Quick Definition
I assume boldness
Strong's Definition
to venture plainly
Derivation: from G575 (ἀπό) and G5111 (τολμάω);
KJV Usage: be very bold
Thayer's Greek Lexicon
ἀποτολμάω, ἀποτόλμω; properly, to be bold of oneself (ἀπό (which see V.)), i. e. to assume boldness, make bold: Rom_10:20; cf. Winers De verb. comp. etc. Part iv., p. 15. (Occasionally in Thucydides, Plato, Aeschines, Polybius, Diodorus, Plutarch.)
Mounce Concise Greek Dictionary
ἀποτολμάω apotol maō 1x
to dare or risk outright; to speak outright, without reserve or restraint, Rom_10:20
Abbott-Smith Greek Lexicon
* ἀπο -τολμάω , -ῶ ,
to be quite bold, make a bold venture: Rom_10:20 .†
Moulton & Milligan — Vocabulary of the Greek NT
ἀποτολμάω [page 71]
Dittenberger prints the verb in Syll 803 .94 , but the context is so mutilated that the citation is at best only probable. The word has warrant from classical and Hellenistic literature.
Liddell-Scott — Intermediate Greek Lexicon
ἀποτολμάω "to make a bold venture", τινί upon one, Thuc. : c. inf., Aeschin. : Pass., τὰ ἀποτετολμημένα "what has been hazarded", Plat.
STEPBible — Tyndale Abridged Greek Lexicon
ἀπο-τολμάω, -ῶ
to be quite bold, make a bold venture: Rom.10:20.†
(AS)