Zusammenfassung This article presents hitherto overlooked evidence that suggests that the Old Irish word for the ‘apple’, ubull, was originally a neuter u-stem. This is then integrated into a general picture of the words for ‘apple’ in Celtic and Indo-European. Along the way, several other problems are discussed: it is demonstrated that the normal, if not regular, genitive plural of neuter u-stems in Old Irish had the ending -Ø; the rules for the operation of MacNeill’s Law after b /β/ are refined; and the question of the regular reflex of *su̯ in Old Irish is investigated.

中文翻译：

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一天一个苹果……

Zusammenfassung 这篇文章提供了迄今为止被忽视的证据，表明“苹果”的古爱尔兰词 ubull 最初是一个中性的 u 型茎。然后将其整合到凯尔特语和印欧语中“苹果”一词的一般图片中。在此过程中，还讨论了其他几个问题：证明了古爱尔兰语中中性 u 词干的正常（如果不是规则的）属格复数以 -Ø 结尾；改进了 b /β/ 后麦克尼尔定律的运行规则；并研究了古爱尔兰语中 *su̯ 的规则反射问题。