The word "gelber" (IPA: ˈɡɛlbər) is a German adjective that means "yellow". In German, every noun has a gender (masculine, feminine, or neuter), and the adjective must change depending on the gender of the noun it describes. "Gelber" is the masculine version of the word. Additionally, the letter "b" is pronounced as "p" in German when it follows an "l" sound, which is why it is spelled with a "b" instead of a "p". So, if you want to describe a yellow masculine noun in German, you would use the word "gelber".
The word "gelber" is German in origin. It comes from the German adjective "gelb", which means "yellow". The suffix "-er" is commonly added to adjectives in German to indicate a comparative or superlative form. So, "gelber" can be translated as "more yellow" or "yellower" in English.