τηρ-ητικός · tēr-ētikos — LSJ
observant, Str. 3.5.8; ἀκολουθία S.E. M. 8.288, cf. Anon.Lond. 36.49; τ. αἵρεσις, τ. ἄνδρες, = ἐμπειρική (-κοί), Gal. Sect.Intr. 1.
Pass., needing to be observed, D.L. 9.108. Adv. -κῶς by observation, S.E. M. 5.70.
retaining, βωμὸς τ. θυσιῶν Ph. 2.151; preservative, Ar.Did. Epit. 33; τοῦ ὑγιαίνειν Sor. 1.42; φύσεων Theol.Ar. 5.