almost

almost的词源是all + mostly.

utmost/uttermost的词源是farthest out. 可做形容词the greatest possible, 或名词the most that can be done.
do/try one's utmost (to do sth): do or try as much as one can --牛津词典

aftermost ≠ foremost; innermost ≠ outermost; northernmost ≠ southernmost; topmost = uppermost

If sb do/try their best to do sth, they try as hard as they can to do it, or do it as well as they can.

1. I'll do my best to pass the exam.
2. I did my best to pass the exam.
3. It wasn't his fault, the exam was too hard.
4. It doesn't matter if you don't win just do your best.
5. As long as you do your best, we'll be happy.

english.stackexchange.com:
Q. "I'll do my best" is not good enough? I read somewhere that the expression "I'll do my best" doesn't sound very positive. Is this true? If so, how do you say to assure the listner of your enthusiasm and determination to perform to the maximum extent of your ability.

A. It depends on the degree of enthusiasm with which it is said. If it occurs as "I'll do my best, but I'm not promising anything", then it doesn't inspire a great deal of confidence. To sound more positive, a speaker would have to say something like "I'm going to do my very best, because I really want to help you'. Assuming it's spoken, much depends on the tone of voice, and indeed on the facial expression, with which it is delivered.

More answers:
1. I will get it done.
2. Rest assured, it will get done.
3. You can count on me!

Nobody mentioned: The medical staff did their utmost (=tried as hard as they could) to save the patient's life. --LDOCE

六级/考研单词: utmost, foremost, outer, enthusiasm, inspire, confide, workforce