What does "odrzekł" mean?
What does "odrzekł" mean in the following sentence?

Ale on odrzekł:
- To nic nie szkodzi. Narysuj mi baranka.

It seems that "odrzekł" is 3rd person past of "odrzec".
As I know, the infinitive of most verb ends with "ć".
Why "odrzec" is ends with "c"?
What is the relation between "odrzec" and "odpowiedzieć"?

Question

What does "odrzekł" mean?
What does "odrzekł" mean in the following sentence?

Ale on odrzekł:
- To nic nie szkodzi. Narysuj mi baranka.

It seems that "odrzekł" is 3rd person past of "odrzec".
As I know, the infinitive of most verb ends with "ć".
Why "odrzec" is ends with "c"?
What is the relation between "odrzec" and "odpowiedzieć"?

Answer

Is no difference between "odrzec" and "odpowiedzieć". First one is used in literaly language.

(Actually it is one difference  - "odpowiedzieć"  as simply "reply" you can also by letter or any other communication method but "odrzec" means reply by speech /voice only.

Answer

There's a rule – verb, which subject ends with "k" or "g" in 3rd person singular past form, ends with "c" in infinitive form. 
rzek-ł – rzec
tłuk-ł – tłuc
bieg-ł – biec
strzeg-ł – strzec