German vocabulary consists of both isolated identifier nouns and verbs, and some that are adopted from ancient and modern sources. Some Deutsch words are unique to Germanic regions. Others have been modified to be used in a universal fashion. It is not uncommon for grammatically-correct German vocabulary to have six or seven syllables with a multitude of contrasting consonant sounds. In many cases, German vocabulary combines the root usage forms of noun or verb hybrids to form one coherent and regionally-understood term. It is advisable that a full mastery of the "swallowed 'R' and umlaut" phonetic variants be mastered before attempting to incorporate advanced German vocabulary into speech.