vaikeassa
Vaikeassa is the inessive singular form of the Finnish adjective vaikea, which means "difficult" or "hard." Finnish adjectives agree with the nouns they modify in number and case, so when a noun is singular and in the inessive case (indicating "in" or "inside"), the adjective takes the suffix -ssa/-ssä. Thus, vaikea becomes vaikeassa to match a singular noun in the inessive.
Vaikeassa is typically used before a noun to convey "in a difficult [state or situation]." For example,
Because the form reflects case, vaikeassa changes with the noun it describes. It is one part of
See also: Finnish grammar; Adjective declension; Inessive case.