Early 17th century; earliest use found in Gerard de Malynes (fl. 1585–1641), merchant and writer on economics. From over- + heaviness, after over-heavy.
Definition of over-heaviness in US English:
over-heaviness
nounˌəʊvəˈhɛvɪnɪs
Excessive heaviness.
Origin
Early 17th century; earliest use found in Gerard de Malynes (fl. 1585–1641), merchant and writer on economics. From over- + heaviness, after over-heavy.