Translation of mar in Spanish

I've met the owner of Dessarmile, who has also already written you (after you came back from Thailand). However, he does not speak Spanish and therefore I do not think that they can be good friends.
If I look at dictionaries they do not give long sentences, only specific words and their meaning when they are used in a compounded form, which by the way can mean something totally different than when used by themselves.
I am also your friend now, how nice is that. I am learning English for a year. I love this language. I already can speak Spanish, because my mother is from Mexico. Your German is really well!