vihamielisin
Vihamielisin is a Finnish adjective form meaning "the most hostile." It is the superlative form of vihamielinen (hostile) and is used to describe extreme hostility in people, groups, attitudes, or actions. The word is not a proper noun; it functions as a descriptive modifier in sentences.
In usage, vihamielisin agrees with the noun it modifies in number and case. Examples: "Se oli vihamielisin
Etymology and nuance: the word is formed by adding the superlative suffix -isin to the stem vihamielinen.
Translations: in English, vihamielisin is rendered as "the most hostile." Related forms include vihamielisempi (more hostile)