Serviceable
SERV'ICEABLE, adjective
1. That does service; that promotes happiness, interest, advantage or any good; useful; beneficial; advantageous. Rulers may be very serviceable to religion by their example. The attentions of my friends were very serviceable to me when abroad. Rain and manure are serviceable to land.
2. Active; diligent; officious.
I know thee well, a serviceable villain. Shak. [Unusual.]