What does a verb infinitive begin with in English and end with in Spanish?

It depends on what part of the infinite verb your asking about. Like in english an infinitive verb begins with the word "to". As in to swim, to eat, to drink, to laugh, etc. And as for spanish, the verb ending is different according to each subect conjugation. Here is what I mean in english.
In the example, the infinitive verb is "to speak".
I speak
You speak
She speaks
We speak
They speak

This is "to speak" in spanish.

Yo hablo
Tú hablas
Ella habla
Nosotros hablamos
Ellos hablan

Now, in english, I only had to conjugate the word speak differently in "she speaks". Where as in spanish, it was all of them. Plus, without a subect, "to speak" in spanish is "hablar". Now this is called an "ar" verb because it end with "ar" and thats the part that is conjugated differently according to the subject being spoken of in the sentence. So i cant tell you what the ending is because it is different according to the subject. Plus there are also "er" and "ir" verbs, which are conjugated differently. Sorry if none of that made any sense, I don't know how much spanish you know so hope this helps.