εως (ἡ) :
      1 surveillance, garde, EUR. fr. 162 ; ARSTT. Pol. 5, 8, 8 ; particul. garde en prison, emprisonnement, d’où prison, THC. 7, 86 ;
      2 vigilance, THC. 7, 13 ; ARSTT. Pol. 5, 8, 8 ; POL. 6, 59, 5 ;
      3 observation scientifique ou autre, PLAT. Def. 413 e ; SEXT. P. 1, 23, etc. ;
      4 observance : ἐντολῶν, NT. de commandements.

Étym. τηρέω.

εως, ἡ, watching, safe-keeping, guarding, ἀφύλακτος ἡ τ. E. Fr. 162; τῆς πολιτείας Arist. Pol. 1308a30, cf. PA 692a7; τῆς πόλεως Supp.Epigr. 6.724 (Perga, ii/i BC); τῆς οἰκίας POxy. 1070.51 (iii AD); ἀξιώματος Pl. Def. 413e; τῆς ἡλικίας Epicur. Sent.Vat. 80; [πλούτου] Phld. Oec. p. 44J. ; preservation, e.g. of health, Gal. 10.646, Pap. in Stud.Ital. 12 (1935).94 (iii AD); observance, νόμων, ἐντολῶν, LXX Wi. 6.18 (19), 1 Ep. Cor. 7.19; λεξάντων πρὸς τὴν τήρησιν τοῦ ὕδατος SIG 683.60 (Olympia, ii BC).
vigilance, Th. 7.13, Plb. 6.11A. 10.
means of keeping or guarding, τὰς λιθοτομίας…, ἀσφαλεστάτην τ. the quarries…, the most secure place of custody, Th. 7.86, cf. Act. Ap. 4.3, BGU 388 iii 7 (ii AD).
observing, observation, τῶν καθόλου συμβαινόντων (as Empiric term) Sor. 1.4, cf. Gal. 15.830, 16.550, 18(2).307, Sect. Intr. 4, S.E. P. 1.23, 2.246, A.D. Synt. 37.14, etc.

εως, ἡ, Bewahrung, Behütung, Beobachtung ; Thuc. 2.13 ; Plat. def. 413e ; Sp., wie NT. Auch = Verwahrungsort, Gewahrsam, Thuc. 6.86 ; NT.

τήρησις, -εως, ἡ
(< τηρέω), [in LXX: Wis.6:18, (Sir.32:23), 1Ma.5:18, 2Ma.3:40, 3Ma.5:44 * ;]
__1. a watching, hence, imprisonment, ward (see Deiss., BS, 267): Act.4:3 5:18.
__2. a keeping: τ. ἐντολῶν (cf. Sir, Wis, ll. with, and see Westc. on 1Jn.2:3.), 1Co.7:19.†
(AS)