What is the origin of pullulate?
The English verb pullulate derives from the Latin verb pullulāre “to sprout, put forth shoots, bring forth,” a derivative of the noun pullus “young animal, foal.” The Latin words derive from the Proto-Indo-European root pau-, pōu-, pū- (with various suffixes) “little, small, few.” The suffixed forms pau-o- and pau-ko form Germanic (English) few and Latin paucus “small, slight,” respectively (the Latin adjective is also the source of Spanish and Italian poco). The suffixed form pō-los yields Greek pôlos “foal, young girl, young boy,” and Germanic (English) foal. The suffixed form pu-er- forms Latin puer “boy” and puella “girl” (from assumed puerla). Pullulate entered English in the early 17th century.