"I would condole her after the loss of her husband."

No. "Condole" is not used with an object. It would be correct to say "condole with him for the death of his uncle." Note that "condole" used this way is not very common, although "condolences" is, especially in the expression "to offer condolences."

Another possibility is that you were thinking of the word console. Condole means to express sympathy with someone who is sad, and console means to comfort someone who is sad or disappointed. It is correct to say "console him over the death of his uncle."

To condole means to express sympathy for someone. Often used to send "condolences" to someone. An example would be: "Betty went home from college to condole with her mother after her father's death".

Pre means before. so the prefix is con.

Many people try to condole others when there is a death in the family