-ost

Inherited from Old Czech -ost, from Proto-Slavic *-ostь; compare Old Church Slavonic -ость (-ostĭ).

-ost f (noun-forming suffix)

1. -ness: from adjectives, forms nouns indicating a property

• -ost in Slovník afixů užívaných v češtině, 2017

• IPA^(key): /ost/

• -ast, -est, -ust

-ost

1. Used to form superlative adjectives and adverbs

   ‎dēop (“deep”) + ‎-ost → ‎dēopost (“deepest”)

   ‎nytt (“useful”) + ‎-ost → ‎nyttost (“most useful”)

-ost

1. Alternative form of -est

Inherited from Proto-Slavic *-ostь; compare Old Church Slavonic -ость (-ostĭ).

-ost (Cyrillic spelling -ост)

1. Appended to adjectives and verbs to create a feminine noun, usually denoting a feature or quality. Similar to -oća.

From Proto-Slavic *-ostь.

• IPA^(key): /-ɔst/, /-óːst/

-ost or -ọ̑st f

1. Forms abstract nouns from adjectives, denoting a quality.