slabí

Slabá is the feminine singular form of the adjective slabý in several West and East Slavic languages (notably Czech and Slovak), meaning "weak" or "feeble." The word is used both attributively (before a feminine noun) and predicatively (after a verb like být/je, "to be") to describe physical weakness, insufficient strength, low intensity, or metaphorical deficiency.

In Czech and Slovak pronunciation the long acute accent indicates a lengthened vowel (slabá). Typical examples include Ona je slabá ("She is weak") and slabá káva ("weak coffee," meaning coffee that is too diluted). The adjective appears in comparative and superlative forms (slabší, nejslabší/nejslabší) and has related nouns and adverbs such as slabost ("weakness") and slabě/slaběji ("weakly" or "more weakly").

Grammatically, slabá follows regular adjective declension for feminine forms in its language context, agreeing in gender, number, and case with the noun it modifies. It occurs in idiomatic expressions and everyday speech to indicate poor performance, low intensity, or lack of potency (e.g., slabý výkon, "weak performance").

Etymologically, slabá derives from the common Slavic root meaning "weak"; cognates exist across Slavic languages, for example Polish słaba and Russian слабая (slabaja). The term remains common in modern usage for both literal and figurative senses.