The Origin of some words

Orange

The name of the fruit was NARANJ in Sanskrit. This language was spoken in ancient India. Indians traded with Arabs, so the word passed into Arabic as NARANJAH. The Spaniards were ruled by north African Arabs who passed the fruit and word into Spanish as NARANJA (pronounced as NARANHA). This came into English where the fruit was a NARANJ. Words ending in J are not common in English so the spelling quickly changed to a NARANGE.
The initial N moved to the a because of mis-hearing to give an ARANGE (this is called metanalysis).
Over time, the initial A became an O to give an ORANGE.

Chocolate

When the Spanish arrived in Mexico they came across the Aztecs. The Aztec language is called Nahuatl. The Aztecs had a drink which they made from a bean they called CHOCO (bitter). They would put this bean into water (ATL) to produce CHOCO-ATL (bitter water). The TL sound is common in the Aztec language but not in Spanish. The Spaniards mispronounced the drink CHOCOLATO.
This drink was brought to Europe (with sugar added) where the pronunciation and spelling in English became CHOCOLATE.

Algebra

This is a mathematical term. It comes from Arabic. Mohammad al-Khwarizmi was a mathematician who flourished in Baghdad around the year 800. He wrote a book about the solving of equations. It was called ilm al-jabr wa'l muqabalah (the science of transposition and cancellation).
The term al-jabr from this title gave the English word, ALGEBRA.

Checkmate

This is a term in chess. It is from the Farsi language spoken in Iran and Afghanistan. The original phrase is SHAH-K-MATE (every syllable pronounced) which means "The King is Dead". The word SHAH means a "king" as in the last monarch (or SHAH) of Iran. MATE has the same root as the English "murder" and the Spanish "matador" (killer).
The word came via French (where the SH became a CH) and into English where the MA-TE (two syllables) became MATE (one syllable) to give CHECKMATE