Lexical tones are used to distinguish lexical meanings. Lexical and phrasal categories together are called syntactic categories. Andalusian has a number of distinguishing phonological, morphological, syntactic and lexical features. To explicitly mark aspect, Arabic uses a variety of lexical and syntactic devices. They share certain intriguing lexical and phonological innovations. Changes in pitch are used for grammatical rather than lexical purposes. Alternatively, a number of phonological, lexical and onomastic features set Macedonian apart. The distinctions made as part of lexical aspect are different from those of grammatical aspect. Pluralisation is effected by means of various grammatical and lexical tools. The roots of PIE are basic morphemes carrying a lexical meaning. This distinction is orthogonal to the distinction between lexical categories and phrasal categories. ALGOL 60 was the first language implementing nested function definitions with lexical scope. There are other languages that form lexical words without vowel sounds. It was also the first language implementing nested function definitions with lexical scope. A closure is an inline function that captures variables from its lexical scope.