I didn't remind what is 'overcome'!

I know a word 'overcome' but I didn't remind the mean suddenly.. After the call, I reminded the mean of the word, I underatood why you were difficult to explain about this word. If I were you, I also couldn't explain it. I have been trying to learn more words, but it's hard using learned words when I speak. So I usually use well-known words. I have to find another way to use new words that I study.
By the way, the answer about 'What did you do to overcome?' is 'I couldn't anything, so I just tried to learn overall process myself. But it's not mean the coworkers were unkind.'