Her perfume was so subtle that he could only catch a hint of it when she passed by.
The prefix "co-" could be used with the act.
The prefix for "cavated" could be "de-" as in "decavated."
You could add the prefix af- to it to make the word affluent.
The prefix "inter-" could be used with "cept" to form the word "intercept."
The opposite of subtle could be obvious. Depending on the context, it could also be overt, harsh, forthright, or coarse.
Her perfume was so subtle that he could only catch a hint of it when she passed by.
The prefix "co-" could be used with the act.
The prefix for "cavated" could be "de-" as in "decavated."
The subtle differences in the shading of the bushes made it very difficult to spot the cheetah, but I knew that I could never outrun him.
You could add the prefix af- to it to make the word affluent.
"Possibility" doesn't have a prefix. You could add the prefix im- to it to make the word impossibility.
The prefix "inter-" could be used with "cept" to form the word "intercept."
"Cost" doesn't have a prefix. You could add the prefix ac- to it to make the word "accost."
Renumber is a prefix numbered is a suffix
A possible prefix for "climbe" could be "dis-" as in "disclimbe."
One possible prefix for "rewrite" could be "re-".