serviceable (adj.)

"ready to do service," early 14c., from Old French servicable, from servise (see service (n.1)). Related: Serviceability.

Edgar: I know thee well: a serviceable villain,
As duteous to the vices of thy mistress
As badness would desire.
["King Lear,"]

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Definitions of serviceable from WordNet

serviceable (adj.)
ready for service or able to give long service;
serviceable equipment
heavy serviceable fabrics
serviceable (adj.)
capable of being put to good use;
a serviceable kitchen gadget
serviceable (adj.)
intended or able to serve a purpose without elaboration;
serviceable low-heeled shoes