Ser'vice-a-ble, a.
a. 1. Doing service; promoting happiness, interest, advantage, or any good; useful to any end; adapted to any good end or use; beneficial; advantageous. “Serviceable to religion and learning.” Atterbury.
Sense 2. Prepared for rendering service; capable of, or fit for, the performance of duty; hence, active; diligent; efficient. “Seeing her so sweet and serviceable.” Thompson.
Bright-harnessed angels sit in order serviceable. Milton.
I know thee well, a serviceable villain. Shak.