Tysyacha

Tysyacha, transliterated from Russian as tysyacha, is the Russian word for the number one thousand and also serves as a feminine noun meaning "a thousand." It is widely used in everyday language to denote large quantities and as a unit of measurement in phrases such as сто тысяч (one hundred thousand).

In Russian numerals, the form of tysyacha changes with the accompanying number. With 2, 3, or 4, the noun takes the form тысяча in the singular replaced by the genitive plural after the numeral, yielding phrases like две тысячи, три тысячи, четыре тысячи. With 5 and above, the form becomes тысяч (e.g., пять тысяч, десять тысяч). The word also appears in fixed expressions and in titles, including the well-known literary phrase Тысяча и одна ночь (One Thousand and One Nights).

Etymology and cognates: tysyacha is cognate with other Slavic languages’ words for thousand, such as Ukrainian тисяча (tisyacha) and Polish tysiąc, reflecting a shared Proto-Slavic heritage for the numeral. The term appears in various historical texts and contributes to compound words such as тысяча лет (a millennium) and тысяче­летний (thousand-year) forms.

Related usage: tysyacha functions as a base for several derivatives, including thousandth (тысячный) and thousand-year terms (тысячелетие). It remains primarily numeric but also features in idiomatic expressions and cultural references where precise quantities or magnitudes are described.