Guessing the meaning of words through context

I looked at the plans of your new house. This is earthquake country. You need to fortify the frame or you'll have a disaster with the first tremor. The word fortify here means:

David hoped that nobody would know he was in the building. Didn't he realize that parking his new car in the driveway made his presence rather conspicuous? The word conspicuous here means:

This is a clandestine operation. It is extremely important that no one discovers what you're doing! A clandestine operation is supposed to be _________________.

I like that store. The employees care about their customers and strive to make the customers feel right at home. Which word is a synonym of "strive"?

If you don't get help quickly for your condition, it could become chronic. Then you may have to take medicine for the rest of your life. Chronic here means:

Connie is never happy when everyone is getting along. He always instigates fights and then acts like Mr. Innocent. When you instigate something, you:

Mary, of course you're always tired. You mostly stay late for work and infrequently take a day off. What does "infrequently" mean?

Michael is an ardent supporter of his presidential candidate. That became obvious to me when I found out how much time he's donated to the campaign. Ardent here means:

I'm working hard for the same candidate that you support. You're doing it for pay but I am not doing this for money. I'm doing it out of conviction. Conviction here means:

"I am going to rescind the permission I gave for you to use my toys," T.J announced angrily. "I thought you would take good care of them, but I was wrong!" Rescind here means:

When Michael and John were fighting over the game, Jack stepped in as a mediator. He sat them both down and got them talking to each other again. Mediator here means:

No one suspected that Jerry was a spy. On the surface he behaved like any normal citizen. When his covert activity was discovered and announced to the world, we were all shocked. Covert here means:

We have lofty expectations for you, son. You will attend college and be elected the president before you turn forty. Lofty here means:

I was working with three other students on a group project. We had so many disagreements that we had to ask the teacher to help us resolve our issues. Resolve here means:

"Sara, why are you upset if you got the red water bottle instead of the green one? You just have to drink water in it. The color of the bottle is such a trivial matter." Trivial means: