What does 負ける mean?
負ける is a Japanese verb meaning “to lose (a game) (v.i.), to be defeated” in English. It can also be translated as “to give in (to), to be inferior (to), to get a rash (from)” depending on context. It is written as 負ける in kanji, まける in hiragana, and makeru in romaji. This word is part of JLPT N4 vocabulary.
Example sentence
３対０で彼には負けています。
He's beating me, three to zip.