No “simpering chit” of a girl, Rebecca is fierce and steely, a woman whose own father cannot quite figure her out.
1560s, "to smile in an affected and silly way," perhaps from a Scandinavian source (e.g. dialectal Danish semper "affected, coy, prudish") or Middle Dutch zimperlijk "affected, coy, prim," of unknown origin. Related: Simpered; simpering. As a noun, 1590s, from the verb.