Not commanded; uninvited

a)	insatiable
b)	admonished
c)	unbidden

A road or railroad following a winding or zigzag course up a steep grade

a)	inexorable
b)	nefarious
c)	switchback

Raided; plundered

a)	marauded
b)	barrage
c)	protocol

Displaying grief in a whining manner

a)	discordant
b)	sniveling
c)	cogitative

Existing at or from the beginning

a)	parameters
b)	primordial
c)	heathen