I know that certain letters are not always pronounced in English words, at least not by all people or in all dialects. For example, for the word mountain, there seems to be at least two native pronunciations, and it seems to me sometimes the t is not pronounced. Notice that the middle of mountain contains a nasal sound (n) followed by a stop (t). This same enviornment exists in combo with m and b.
I can't hear the b in combo breaker in this video from the game Killer Instinct. So I began to wonder if sometimes the b is not pronounced in combo like the t is not pronounced in mountain.
There is also this video ('How to pronounce combo'); I don't know if English speakers always pronounce the b.
Background note: I have always heard the word combo without any silent letter almost everywhere but not in the video game Killer Instinct. When I was a kid I used to play this game and tried to repeat the phrase "combo breaker" but I wasn't close to it because I didn't understand any English nor was trying to learn. So, today my niece was saying the same thing I used to say when I was a kid and I thought, wow! I need to find out the right pronunciation and got on YouTube and found this video and I heard "combo breaker" but with silent b so I thought I would ask where this English comes from and here I am asking. Check the link I gave to hear, or should I say watch, the video? Anyway the video makes the same sound as the Killer Instinct I used to play. I thought I should give this little extra piece of information just so you know.