[General] rip apart/edgy/on edge/set one's teeth on edge/get hold of/

Dear teachers,

Would you be kind enough to tell me whether I am right with my interpretation of the expressions in bold in the following sentences?

It's a waste of time and energy to rip yourself apart over something you no longer have the power to change.

The family is ripped apart by a young mother's death.

rip apart = be in torments

A bomb ripped apart the train.

rip apart = blow to pieces

You're kind of edgy today. Did you sleep well last night?

edgy = nervous

The magician kept the children on edge all through his show.

We were all on edge as we listened to the TV for news of the election results.

Father was on edge after driving home through the heavy holiday traffic.

on edge = excited or nervous; impatient

She looks so mean that her face sets my teeth on edge.

set one’s teeth on edge = irritate, annoy, make one cringe

The lemon juice set my teeth on edge.

set one’s teeth on edge = to have a sharp sour taste that makes you rub your teeth together

Mr. Thompson spent several hours trying to get hold of his lawyerbut the line was right along busy.

get hold of = to communicate with, as by telephone

Little children sometimes get hold of sharp knives and cut themselves.

get hold of = to get possession of

You must get hold of yourself!

get hold of = to gain control of

Thank you for your efforts.

Regards,

V.