Sounds like you are reading a book. Many of your questions have to do with the context of what you aren’t reading because these statements are used to create imagery. 1) pushed himself to giant feet or forced himself to get up. 2) when you ration something you conserve it. It is usually used for food but I’m guessing the we’re reading a book and didn’t want to finish. 3) I’m not sure what wry is because that is. OT the correct spelling but witty means funny or sarcastic. Someone who is quick on their feet. 4) You are correct. 5) I need more context to answer this question. Hope this all helps and if you are looming for an English tutor please let me know.