viel

much, many / In the singular, the adjective is usually left unchanged when it is not preceded by an article or determiner (see example sentence above). Otherwise it is declined like a normal adjective: das viele Geld. / In the plural, the adjective is usually declined even without a preceding article or determiner: viele Kinder. However, it may be left unchanged when modified by a preceding adverb, e.g. in the combinations wie viel (“how many”) and so viel (“so many”): wie viel Kinder or wie viele Kinder. / The comparative form mehr is invariable and never declined; it cannot be preceded by any article or determiner (note however mehrere, mehreres, and obsolete mehre, mehres). The superlative meist- is declined like a normal adjective.