Abstract The threefold division noun-verb-adjective is often considered a hallmark of the IE family from the remote PIE phase. However, Alfieri (2016, 2018, forth.) claims that this view is incorrect: while in Latin three major classes of lexemes are found (nouns, verbs and adjectives), in the Sanskrit language of the Rig Veda only two major classes are found (verbal roots and nouns) and the most typical “adjective” (i.e. the Quality Modifier) is a derived stem built on a verbal root meaning a quality. As a consequence, a deep and previously neglected typological change should be reconstructed in the IE family, namely the lexicalization of the adjective class and the change from a parts of speech (PoS) system “without” adjectives and quality concepts verbally encoded, which is still preserved in the RV, to a PoS system with “true” adjectives, which is found in Latin and in almost all other, especially modern and Western, IE languages. In this case, the data in Alfieri (2016, 2018, forth.) are confirmed focusing on the Quality Argument and the Quality Predicate, so as to show that the presence of a lexical class of adjectives is a common development that has come about independently in different branches of the IE family.

中文翻译：

---

形容词类的词汇化是印欧语系的一种创新功能

摘要从远程PIE阶段开始，三重划分名词动词形容词通常被视为IE家族的标志。然而，Alfieri（2016，2018，等等）声称这种观点是不正确的：虽然在拉丁语中发现了三大类词素（名词，动词和形容词），但在瑞格·吠陀的梵语中却发现了两个主要类。 （语言根和名词）和最典型的“形容词”（即“质量修饰语”）是在词根上构建的衍生词干，意思是质量。因此，应该在IE家族中重建一个较深的，以前被忽略的类型变化，即形容词类的词汇化和词性（PoS）系统中“无”形容词和口头编码的质量概念的变化，即仍保留在RV中，到带有“真实”形容词的PoS系统，在拉丁语以及几乎所有其他语言（尤其是现代和西方IE语言）中都可以找到它。在这种情况下，确认了Alfieri（2016年，2018年）中的数据侧重于质量论点和质量谓词，以表明存在一个形容词类的形容词是一个独立的共同发展在IE系列的不同分支中。