paucity (noun) - a small amount or not enough of something; scarcity, insufficiency, or lack [paw-si-tee]
BREAKDOWN: PAU- (few, little) + -CITY (state of)
a pauper is a very poor or destitute person
puerile means childish, immature, or silly; acting in a juvenile manner
“Seeing this gradation and diversity of structure in one small, intimately related group of birds, one might really fancy that from an original paucity of birds in this archipelago, one species had been taken and modified for different ends.” —Charles Darwin