Further meanings of the word, in 'GIG' spelling:

A machine for raising cloth, to prepare for dressing.
A boat.
A silly, flighty person.
A machine for winnowing corn.
To hasten along.
A top. A decoy for birds.
A cock. Or maybe a pig's foot. (?)
A fiddle.
To talk or chatter.
A hole in the earth to dry flax in.

As was pointed out above, a hard-working word.