σῖγα
σῖγα
σιγή
silently, σῖγα ἔχειν to be silent, Soph.; κάθησο σῖγα Ar.; alone, σῖγα hush! be still! Aesch.:—the public crier proclaiming silence said σῖγα πᾶς (sc. ἔστω) Ar.
under oneʼs breath, in a whisper, secretly, Aesch., Soph.