at the end vs. in the end

 At the end implies a point in time, or it simply refers to the position of something.  It means the time when something ends.

• At the end of his life, he had no regrets.
• We put a period at the end of every sentence.
• I pay my electricity bill at the end of every month.
• We scored a goal at the end of the match.
• In Disney movies, the princess always marries her prince at the end. (Meaning: marriage happens in the final scenes of the movie.)

In the end suggests that something happens after changes or uncertainty. We use in the end to mean a final result or a final resolution of a situation.

• It was a tough game but we won in the end.
• He gave over fifty interviews but got his dream job in the end.
• In the end, parents know best.
• It was a tough match, but we won in the end.
• In Disney movies, the princess always marries her prince in the end. (Meaning: the princess marries her prince after some difficulties and hurdles.

familiar to, familiar with

Familiar to means known to. If someone or something is familiar to you, you recognize it well.

• His work is familiar to me.
• Her face is familiar to the crowd.
• This tune is familiar to most of the singers.
• The appearance of the Polar bear is familiar to all.
• The name of the school was not familiar to me.

Familiar with means having a fairly good knowledge of. If you are familiar with something, you know or understand it well.

• He is familiar with the countryside.
• Sam was familiar with those streets.
• Eva is quite familiar with Central Television; she worked there for 5 years.
• I'm familiar with various teaching software packages.
• I’m not familiar with the latest research in this field.

Idiom: Break Bread

Meaning and usage