Quick questions about vocab,

Question

Insidious literally translates to "sitting in," but the word means "secretly working to cause harm." Explain the possible connection between the actual and literal definitions?

Also, list as many words as you can think of that contain the root sid? I can not think of ANYTHING

and if you don't mind, what does potation mean?

Answer 1

First look the word up here:
http://www.etymonline.com/

Read about the word's etymology very carefully. Then tell us what you think.

Answer 2

Words with the root sid:
1. President
2. Reside
3. Residence
4. inside
5.preside

Potation: The act of drinking something

*Unfortunately I can't explain your "Insidious" issue

Answer 3

Thanks so much!