Liddell-Scott-Jones
ἄκρος (akros) a toe/thumb/tip TEGMC
ἄκρος, α, ον,
(on the Root see at {ἀκή} A) at the farthest point or end, hence either topmost, outermost, or inmost.
__1 highest, topmost, ἀκροτάτῃ κορυφῇ[Refs 8th c.BC+]; ἐν πόλει ἄκρῃ, ={ἐν ἀκροπόλει}, [Refs 8th c.BC+]; λάψοντες.. μέλαν ὕδωρ ἄκρον at its surface, [Refs]; ἄκρον ῥινόν surface of skin, [Refs 8th c.BC+]; ἐπ᾽ ἄκρων ὀρέων o mountain tops, [Refs 5th c.BC+]: superlative ἀκρότατος, ὔσδος[Refs 7th c.BC+]; ὀρόφοισι Oracle texts cited in [Refs 5th c.BC+]
__2 outermost, πεδίον ἐπ᾽ ἄκρον to the farthest edge of the plain, [Refs 5th c.BC+]; κατ᾽ ἄκρας σπιλάδος from the surface of a stone, [Refs]; especially of extremities of body, ἄ. χείρ, πόδες, ὦμος, end of hand, ends of feet, tip of shoulder, [Refs 8th c.BC+]; but τὸ ἄ. τῆς χειρός, τοῦ ποδός, thumb, great toe, [LXX+5th c.BC+]; πίτυν ἄκρας τῆς κόμης καθέλκων by the top of the crown, [Refs 5th c.BC+] —ἐπ᾽ ἄκρων [δακτύλων] on tiptoe, [Refs 5th c.BC+], ubi see Scholia; comically, ἐπ᾽ ἄκρων πυγιδίων on tip-tail, [Refs 5th c.BC+] —οὐκ ἀπ᾽ ἄκρας φρενός not from the outside of the heart, i.e. from the in mostheart, [Refs 5th c.BC+]; ἄκροισι λαίφους κρασπέδοις with mere edges of sail, i.e. under close-reejed sails, [Refs 5th c.BC+]
__2.b Geometry texts, of the extremity of a line, ἡ ἐπ᾽ ἄκραν τὴν ἀποληφθεῖσαν ἀγομένη[Refs 2nd c.AD+]: in Mathematics texts, of extremes in a proportion, [Refs 5th c.BC+]; εἰς ἄκρον καὶ μέσον λόγον τέμνειν cut in extremeand mean ratio, [Refs 3rd c.BC+]
__2.c in Tactics, ἄκροι, οἱ, flank men, [Refs 1st c.BC+]
__3 inmost, μυελός[Refs 5th c.BC+]
__II of Time, ἄκρᾳ σὺν ἑσπέρᾳ on the edge of evening. i.e. at nightfall, [Refs 5th c.BC+]; ἄκρου τοῦ ἔαρος at beginning of spring, [Refs 2nd c.BC+]; but usually denoting completeness, ἄκρου τοῦ θέρεος at mid-summer, [Refs 5th c.BC+]; ἄκρας νυκτός at dead of night, [Refs 5th c.BC+]
__III of Degree, highest in its kind, consummate,
__III.1 of persons, [Refs 5th c.BC+]; θεσφάτων γνώμων ἄ.[Refs 5th c.BC+]; of any extremes, opposed to τὰ μεταξύ, τοῖς ἄ. τὰ ἄ. ἀποδιδόναι[Refs]; of classes in a state, [Refs 4th c.BC+]: in moral sense, both good and bad, ἐπιδικάζονται οἱ ἄ. τῆς μέσης χώρας[Refs]; αἱ ἄ. [διαθέσεις[Refs] —with _accusative_ modi, ψυχὴν οὐκ ἄ. not strong of mind, [Refs 5th c.BC+]; ἄ. ὀργήν quick to anger, passionate,[Refs 5th c.BC+]
__III.2 of things, highest, extreme, συμφορά[Refs 4th c.BC+]: superlative, [Refs 5th c.BC+]
__IV as substantive, see at {ἄκρα, ἄκρον}.
__V neuter as adverb, on the top or surface, ἄκρον ἐπὶ ῥηγμῖνος[Refs 8th c.BC+]
__V.2 regular adverb ἄκρως, ἀνεστάλθαι to be turned up at the point, [Refs 5th c.BC+]
__V.2.b utterly, perfectly, [Refs 5th c.BC+]; σχῆμα ἄ. στρογγύλον absolutely round, [Refs 2nd c.BC+]
__V.2.c skilfully, [Refs 1st c.BC+]
LSJ Scripture Refs: LXX.Exod.29.20 ☩ LXX.Lev.18.22