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