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! Type in unicode polytonic Greek using beta code as indicated below:
/a => ά \a => ὰ =a => ᾶ )a => ἀ
(a => ἁ !a => ᾳ +i => ϊ h => η
q => θ x => χ c => ξ z = ζ
j => ψ w => ω s => σ, ς  
Combine punctuation marks when necessary e.g. )/a => ἄ
παρεξίστημι

(aor. παρεξέστησα) 1   fazer algo sair de seu estado natural; desviar; desencaminhar 2   aturdir: π. τὴν διάνοιαν plut. perturbar o espírito

intr. (aor.2 παρεξέστην e perf. παρεξέστηκα) 3   sair de seu natural; transformar-se: π. τῇ διανοίᾳ pol. perder a razão 4   corromper-se 5   (vinho) azedar.