ˈburdensomely, ˈburthen-,adv. [f.prec. + -ly2.] In a burdensome manner. 1611Cotgr., Poisamment, heauily, weightily, burthensomely.1848J. S. Mill Pol.Econ. II. v. vi. §3. 425 That as few employments as possible may be burthensomely and vexatiously interfered with.