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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
ὀνήϊος, ος, ον

jôn. 1   útil

superl. ὀνήϊστος, η, ον 2   o mais útil; o mais eficaz contra algo, gen.

♦ ὀνήϊστον adv. 3   da maneira mais vantajosa. 〈ὀνίνημι〉