multiply

(verb) combine by multiplication. Example: "Multiply 10 by 15."

(verb) combine or increase by multiplication. Synonyms: manifold. Example: "He managed to multiply his profits."

(verb) have young (animals) or reproduce (organisms). Synonyms: breed. Examples: "Pandas rarely breed in captivity." "These bacteria reproduce."

(verb) have offspring or produce more individuals of a given animal or plant. Synonyms: reproduce, procreate. Example: "The bible tells people to procreate."

(adv) in several ways; in a multiple manner. Example: "They were multiply checked for errors."