(a suffix which forms nouns that refer to people who regularly engage in some activity, or who are characterized in a certain way, as indicated by the stem or root of the word; originally, which appeared in Middle English in words from Old French where it expressed an intensive degree or with a pejorative or disparaging application)

(Latin: a round body, a ball; round, a sphere; the earth; "sphere" came from Latin globus, "round mass, sphere"; related to gleba, "clod, soil, land". Sense of "planet earth," or a three-dimensional map of it, appeared first in 1553)

(Latin: a bug; literally, "cut into," from insectum, with a notched or divided body; literally, "that which is cut up, segmented" [as the bodies of the first invertebrates to which the term was applied or appeared to be])