Prefix un and re

The prefix 'un-' means 'not' or 'the opposite of.'

The prefix 're-' means 'again' or 'back.'

An example is 'unlock,' which means to open something that was locked.

An example is 'relight,' which means to light something again.

Unequal means not equal or not the same in quantity, size, or value.

Rewrite means to write something again, often to improve or change it.

Reopen means to open something again after it has been closed.

The prefix 'un-' negates the original meaning of the word, indicating the opposite.

The prefix 're-' indicates that an action is being done again or returned to a previous state.

Unlock means to open something that is locked, while lock means to secure something to prevent it from being opened.