unacquainted

adjective2

1. •
   Not acquainted, unfamiliar (with someone or something).

   • The Romains vnacquainted with such perills, wold not endure the hasard of the siege. — 1563
2. •
   (no longer used) Not usual; unfamiliar; strange.

   • Who when she saw Duessa sunny bright, Adornd with gold and iewels shining cleare, She greatly grew amazed at the sight, And th’vnacquainted light began to feare: — 1590