θυγάτριον ὡραῖον ἤδη γάμου → a girl already of marriageable age | a daughter, already marriageable
ἴστω: γ΄ ἑνικ. προστ. τοῦ οἶδα· πρβλ. ἴττω.
3ᵉ sg. impér. de οἶδα.