A chaperon was usually expected to be a married woman, although a respected, older unmarried or widowed woman (typically someone beyond child-bearing age) was often acceptable. Chaperones were usually not required in situations where an unmarried womans father was able to accompany his daughter(s).

Is the use of tricky actions to hide or get something?

Subterfuge is the use of tricky actions to hide or get something. Subterfuge is from French, from Old French suterfuge, from Late Latin subterfugium, from Latin subterfugere to escape, from subter secretly, under plus fugere to flee.