Indo-European copula copula (with corresponding voiceless and voiced fricatives) existed side by side in Germanic, and the involvement of a separate root "" is unnecessary. The root "*(s)teh-" meant "to stand". From this root comes the present stem of the so-called "substantive verb" in Irish and Scottish Gaelic, "tá" and "tha" respectively. On the absence of the initial s- in Celtic, see Indo-European s-mobile. In Latin, "stō, stare" retained the meaning "to stand", until local forms of Vulgar Latin began to use it as a copula in certain circumstances. Today, this survives in that several Romance languages (Galician-Portuguese, Spanish, Catalan) use it
Indo-Uralic languages vocabulary common to Indo-European and Uralic remains. As examples they advance such comparisons as Proto-Uralic *' (or *') : Proto-Indo-European *', oblique stem *', both meaning 'water', and Proto-Uralic *' (or *') : Proto-Indo-European *', both meaning 'name'. In contrast to *' and *', the phonology of these words shows no sound changes from Indo-European daughter languages such as Indo-Iranian. In contrast to *' and *"", they show no morphological affixes from Indo-European that are absent in Uralic. According to advocates of the Indo-Uralic hypothesis, the resulting core of common vocabulary can only be explained by the hypothesis of common