a novice at a stranger to callow disaccustomed fresh green green as grass ignorant immature inexperienced new to raw rusty unaccustomed unaccustomed to unacquainted with unconversant unconversant with undemonstrated undeveloped unexperienced unfamiliar with unfledged unhabituated unhardened uninitiated in uninured unmatured unpracticed in unproved unripe unseasoned unskilled in untested untrained untried unused unused to unversed unversed in unwonted weaned