-ify

turns a noun or adjective into a verb meaning make or cause to become

Spelled -ify, -fy · -ficare, from facere 'to make or do'

Latin facere, to make, became -ify: clarify makes clear, purify makes pure, and solidify makes solid.

Words built from it

clarify — to make an idea or statement clearer
clar- (clear) + -ify (make)
purify — to remove impurities and make clean
pur- (clean) + -ify (make)
solidify — to make or become solid or firmly established
solid (firm) + -ify (make or become)
classify — to arrange things into categories
class (group or category) + -ify (arrange as)
magnify — to make something appear larger or more important
magn- (great) + -ify (make)