three voices (active, middle, and passive). As in other Semitic languages, the majority of verbs are built upon a triconsonantal root, each of which may yield one or more of six verbal stems: the G-stem or basic stem, the D-stem or transitivizing-denominative verbal stem, the C-stem or causative verbal stem, and the tG-, tD-, and tC-stems, to which a derivational morpheme, t-, was prefixed before the first root consonant. This morpheme has disappeared from all roots save for those possessing a sibilant as their initial radical, such as eṣṭəwɔ ~ eṣṭəwi (meṣṭəwi) ‘to be baptized’ in the G-stem or eštallam ~ eštallam (meštallam) in the C-stem, in which the stop and the sibilant are metathesized. A seventh stem, the Q-stem, is reserved exclusively for those verbs possessing four root consonants. Verbs that begin with a vowel rather than a consonant are called I-weak. Verbs beginning with the approximants n and y, which were susceptible to assimilation in Classical Mandaic, have been reformed on the analogy of the strong verbs. When they appear as the second or third radical of a consonantal root, the liquids w and y are susceptible to the general collapse of diphthongs described above. The verbs that are thus affected are known as II-weak and III-weak verbs. Those roots in which the second and third radical consonants were identical have been reformed on the analogy of the II-weak verbs; this process had already begun in Classical Mandaic. A very large and productive class of verbs in Neo-Mandaic consists of a verbal element and a non-verbal element, which form a single semantic and syntactic unit. The non-verbal element is most often a noun such as əwɔdɔ ‘deed’ in the compound əwɔdɔ əwad ~ əwod (ɔwed) ‘to work or to do something,’ or an adjective such as həyɔnɔ ‘alive’ in the compound həyɔnɔ tammɔ ‘to survive,’ although prepositions such as qɔr ‘at,’ in the compound qɔr tammɔ ‘to be born to s.o.,’ are attested. In many of these compounds, the verbal element is a "light" verb, which serves only to indicate verbal inflections such as person, tense, mood, and aspect; the meaning of these compounds is primarily derived from the non-verbal element, which always precedes the verbal element. The most common light verbs are əwad ~ əwod (ɔwed) ‘to do,’ əhaw ~ əhow (ɔhew) ‘to give,’ məhɔ ~ məhi (mɔhi) ‘to hit,’ and tammɔ ‘to become.’ Although phrasal verbs