It would be "de" as in "devalue."
UNfreeze
This is an idiomatic usage, but if bug is a verb, then the opposite is unbug. Correction:If you are meaning "bug" as in "to conceal a listening device," the prefix would be "de" as in "debug."
The prefix 'im' can added to make the word impolite.
mis- can be added to behave to make "misbehave."
The prefix semi- added to "sweet" would make semi-sweet, which means "partly sweet."
The prefix added to the word "approve" to make it its opposite is "dis-", resulting in the word "disapprove."
UNfreeze
This is an idiomatic usage, but if bug is a verb, then the opposite is unbug. Correction:If you are meaning "bug" as in "to conceal a listening device," the prefix would be "de" as in "debug."
Dis-comfort
un as in unbolt.
The prefix 'im' can added to make the word impolite.
Im- is the correct prefix. This would make the word immature.
Re can not be added to chronic to make rechronic. There is no prefix you can add to chronic.
The prefix "in" could be used to make the opposite word insufficient.
The root word for "deflate" is "flat," which means to make or become level or even. "De-" is a prefix added to "flat" to indicate the opposite or reversal of the action.
mis- can be added to behave to make "misbehave."
An SI prefix, unless that unit already has a prefix.