Topic summary
Superlative

Extracted from the Wikipedia article Degrees of comparison of adjectives and adverbs.
Estonian
In Estonian, the superlative form can usually be formed in two ways. One is a periphrastic construction with kõige followed by the comparative form. This form exists for all adjectives. For example: the comparative form of sinine 'blue' is sinisem and therefore the periphrastic superlative form is kõige sinisem. There is also a synthetic ("short") superlative form, which is formed by adding -m to the end of the plural partitive case. For sinine the plural partitive form is siniseid and so siniseim is the short superlative. The short superlative does not exist for all adjectives and, in contrast to the kõige-form, has a lot of exceptions.