LSJ
Adv. pf. part. Pass. of ἀνατείνω, stretched or strained to the utmost Sch. Ar. Ra. 1282.
Liddell-Scott-Jones, Greek-English Lexicon (9th ed., 1940)
Pape
(ἀνατείνω), angespannt, angestrengt, Schol. Il. 2.224.
Pape, Griechisch-deutsches Handwörterbuch (3. Aufl., 1914)