Lexical Definition

‎ἀφίστημι‎ aphístēmi (af-is'-tay-mee) to leave ^G:V
from ‎ἀπό‎ and ‎ἵστημι‎

depart, draw (fall) away, refrain, withdraw self.

• to remove, i.e. (actively) instigate to revolt
• usually (reflexively) to desist, desert, etc.

Abbott-Smith

ἀφ-ίστημι, [in LXX for סור, מעל, etc. (41 words in all);]
1. trans. in pres., impf., fut., 1 aor., to put away, lead away; metaph., to move to revolt: Ac 5:37.
2. Intrans. in pf., plpf., 2 aor., to stand off, depart from, withdraw from: c. gen., Lk 2:37; seq. ἀπό, Lk 4:13 13:27, Ac 5:38 12:10 15:38 19:9 22:29, II Co 12:8; metaph., ἀπὸ ἀδικίας, II Ti 2:19; ἀπὸ θεοῦ, (fall away, apostatize), He 3:12. Mid. (exc. 1 aor., wh. is trans.), to withdraw oneself from, absent oneself from: Lk 2:37; metaph., fall away, apostatize: absol., Lk 8:13; c. gen., I Ti 4:1 (MM, s.v.; Cremer, 308).†

Abbott-Smith References

Liddell-Scott-Jones

ἀφίστημι:

causal in present and imperfect, in future ἀποστήσω, and aorist I ἀπέστησα, as also in aorist I middle (see. below):—put away, remove, keep out of the way, τὸ ἀσθενέστατον τοῦ στρατεύματος[Refs 5th c.BC+]; of diseases, [Refs 5th c.BC+]hinder from.., [Refs 5th c.BC+]; ἀ. τὰς τῶν πολεμίων ἐπιβουλάς frustrate them, [Refs 5th c.BC+]; ἀ. τὸν ἄρχοντα depose him, [Refs 5th c.BC+] —aorist middle, Ἀργείων δόρυ πυλῶν ἀπεστήσασθε remoued it from your own gates, [Refs 5th c.BC+], having retired.

__2 cause to revolt, of allies, [Refs 5th c.BC+]
__3 in geometrical constructions, cut off, [Refs 5th c.AD+]
__II weigh out, [Refs 5th c.BC+]; pay, δραχμὰς ή ἀργυρίου[Refs 2nd c.BC+]aorist I middle, μὴ.. ἀποστήσωνται Ἀχαιοὶ χρεῖος lest they weigh out (i. e. pay in full) the debt, [Refs 8th c.BC+] —in strict sense of middle, ἀποστήσασθαι τὸν χαλκόν to have the brass weighed out to one, [Refs 8th c.BC+]
__III middle, give a final decision (or break up, dismiss the assembly), ῥήτρα cited in [Refs 1st c.AD+]
__B intransitive, in passive, as also in aorist 2 ἀπέστην, imperative ἀπόστηθι[Refs 5th c.BC+]perfect ἀφέστηκα in present sense, syncopated. in plural ἀφέστᾰμεν, -στᾰτε, -στᾶσι, as in infinitive ἀφεστάναι, participle ἀφεστώς, -ῶσα, -ός or -ώς: pluperfect ἀφεστήκειν, Attic dialect -κη[Refs 5th c.BC+]: future middle ἀποστήσομαι[Refs 5th c.BC+]aorist I middle is causal (see. above)): for future ἀφεστήξω see entry .:—stand away or aloof from, keep far from, ὅσσον δὲ τροχοῦ ἵππος ἀφίσταται[Refs 8th c.BC+]; ὡς γραφεὺς (or βραβεὺς) ἀποσταθείς[Refs 5th c.BC+] lose one's wits, [Refs 5th c.BC+]; οὐδενὸς ἀποστήσονται ὅσα ἂν δίκαια λέγητε depart from, object to right proposals, [Refs 5th c.BC+]; ἀ. ἀρχῆς to be deposed from office, [Refs 5th c.BC+]; simply, resign, [Refs 3rd c.BC+]; ἀ. τῶν πραγμάτων, τῆς πολιτείας, etc., withdraw from business, politics, have done with it, [Refs 4th c.BC+]; ἔργων ἢ πόνων ἢ κινδύνων shun them, [Refs 5th c.BC+]; ὧν εἷλεν ἀποστάς giving up all claim to what he had won (at law), [Refs 4th c.BC+]; τὴν πολιτείαν.. τὴν ἀφεστηκυῖαν τοῦ μέσου πλεῖον further removed from.., [Refs 4th c.BC+]; ἀ. ἐκ Σικελίας withdraw from the island, give up the expedition, [Refs 5th c.BC+]; retire, ἐς Ἰθώμην[Refs]: rarely c.accusative, avoid, shrink from, τὸν ἥλιον[Refs 5th c.BC+]
__B.2 in Prose, ἀ. ἀπό τινος revolt from.., [Refs 5th c.BC+]: absolutely, revolt, [Refs 5th c.BC+]; ὑπό τινος at his instigation, [Refs 5th c.BC+]
__B.3 ἀ. τινί make way for another, give way to him, [Refs 5th c.BC+]
__B.4 with genitive, shrink from, τῶν κινδύνων[Refs 5th c.BC+]: also with infinitive, shrink from doing, ἀπέστην τοῦτ᾽ ἐρωτῆσαι σαφῶς[Refs 5th c.BC+]
__B.5 absolutely, stand aloof, recoil from fear, horror, etc., τίπτε καταπτώσσοντες ἀφέστατ;[Refs 8th c.BC+]; desist, μὴ νῦν -ώμεθα[Refs 5th c.BC+]a runaway, [Refs 5th c.BC+]
__B.6 in Medicine texts, ἀφίσταται, ={ἀπόστασις γίγνεται, εἰς ἄρθρα} [Refs 5th c.BC+]; ἀ. ὀστέον exfoliates, [Refs]; also ἀ. ἀπὸ τῶν ὀστῶν[Refs 5th c.BC+]; also, project, stand out, ὦτα ἀφεστηκότα[Refs 1st c.BC+]
__B.6.b to be separated by the formation of an abscess, [Refs 2nd c.AD+] (also in active, τὸ πύον ἀφίστησι 7.715).