what is the meaning of "irrepresentable condition"? what is the meaning of "irrepresentable condition"?

what is difference between "in the end" and "at the end"?

what is difference between "chose" and "select"?

what is meaning "As it turns out"?

what different is between "a lot smaller" "much smaller" "far smaller"?

when can i use "more easily" and "more easier" ?what different is between those?