late 14c., pusillanimite, "timidity, faint-heartedness, lack of the spirit of courage or fortitude," from Old French pusillanimité (14c.) and directly from Church Latin pusillanimitatem (nominative pusillanimitas) "faint-heartedness," from Latin pusillanimis "faint-hearted, having little courage" (see pusillanimous).
1530s, "lack of breeding or refinement, awkwardness," from French rusticite (15c.), from Latin rusticitatem (nominative rusticitas) "country life," from rusticus (see rustic (adj.)). By 1630s as "rural life, quality, or character; anything betokening a rustic life or origin."