… exceed?
And what are some other words that don’t have opposites?
underachieve?
That doesn’t cover “hitting it right on the money” though.
fall short of?
A word with no opposite: blue. 
Technically speaking, the exact opposite of “exceed” is “not exceed”.
Unless you’re hooked on the notion of the color wheel where the complimentary (as opposed to opposite) color is orange…
Now, if you’re into blue as an emotion, i suppose the issue gets clouded further by “what’s the opposite of not so hot?”
This whole notion reminds me of how when the temp has gone from 40 degrees to 80 how some people tend to think it’s “twice as hot.”
What’s the opposite of now?
not now
Then.
Much more succinct than ‘not now’.
Then
eta: never mind
To trail?
uncouth
intrepid
There’s underwhelmed and overwhelmed. What ever happened to regular whelmed?
Couth
That’s all I got
“Trepid” is also a word (at least in an unabridged dictionary). Or you could go with timid, fearful, cowardly, etc.
Well, in that sense, left isn’t the opposite of right, because it doesn’t cover ‘middle’.
Recede?
Hardy har har.
No, that’s why left is the opposite of right. “Opposite” doesn’t mean “everything except”; it means, well, opposite; as far in the other direction; the negative of the quantity, not zero.
In addition to “the opposite of” something, there’s the equally daunting concept of “the absence of” something else.
When one of my kids, at an early age, asked me to define “cold” in an easy to understand way, I went into the “cold is the absence of heat” spiel and thought I was making the point when the other kids chimed in with things like “dark is the absence of light” and “death is the absence of life” and quite a few others, until one of them came up with “Fixed is the absence of broke.”
Ever since then, whenever possible, I go with “the absence of” in preference to “the opposite of” purely for the giggles.
“Couth” does get used occasionally. It’s a good word.
Be a little more couth, why doncha?
Fail.
Well, originally, I was going to say “orange”…but then I thought, no, that’s a secondary color; and once you make the 3 primaries into 6 secondaries, that’s an even number, and then you have “opposites”. So I said blue, because I thought as one of three things it would be indisputably unopposed.
Musta forgot where I was posting.