avocadoyoudaoicibaDictYouDict[avocado 词源字典]
avocado: [17] Anyone tucking into an avocado could well be taken aback to learn that in the South American Indian language from which the word originally came, it meant literally ‘testicle’. The Nahuatl Indians named the fruit ahuacatl ‘testicle’ on account of its shape. The Spanish conquistadors took the word over as aguacate, but before long this became altered by folk etymology (the substitution of familiar for unfamiliar forms) to avocado (literally ‘advocate’ in Spanish).

When English borrowed the word, folk etymology took a hand yet again, for in the late 17th century it became known as the alligator pear, a name which survived into the 20th century.
[avocado etymology, avocado origin, 英语词源]
avocado (n.)youdaoicibaDictYouDict
1763, from Spanish avocado, altered (by folk etymology influence of earlier Spanish avocado "lawyer," from same Latin source as advocate (n.)) from earlier aguacate, from Nahuatl (Aztecan) ahuakatl "avocado" (with a secondary meaning "testicle" probably based on resemblance), from proto-Nahuan *pawa "avocado." As a color-name, first attested 1945. The English corruption alligator (pear) is 1763, from Mexican Spanish alvacata, alligato.